Fabricación de grado OEM · Zhongshan

Fabricante de piezas de caucho personalizadas

Componentes de caucho moldeado de calidad OEM de una instalación con certificación IATF 16949 de 53.000 m²

Fabricación de piezas de caucho personalizadas Engelhardt para programas OEM

Engelhardt fabrica piezas de caucho personalizadas para programas OEM en plomería, conectores eléctricos, accesorios sanitarios y sistemas de baños aeroespaciales. Nuestro Complejo de fabricación de 53.000 metros cuadrados en Zhongshan ejecuta más de 40 prensas de vulcanización, incluidos vulcanizadores al vacío de 250 toneladas y máquinas de moldeo por inyección de caucho de 300 toneladas, con 2.000 toneladas de capacidad de componentes de caucho moldeado al año. Proyectos de soporte de certificación ISO 9001 y IATF 16949 que requieren trazabilidad por lotes, registros de inspección entrantes y documentación de producción lista para auditoría.

Engelhardt Custom Rubber Parts Manufacturer — OEM Molded Rubber Components
2009
Fundado
OEM de más de 17 años
01 Certificado

ISO 9001 + IATF 16949

Certificado dual de grado automotriz (la mayoría de los competidores solo poseen ISO 9001).

02 Escala

Planta de 53.000m² + 40 Vulcanizadores

Escala física que respalda los contratos de volumen OEM y la transparencia de las auditorías.

03 Nivel 1

Clientes OEM de nivel 1 nombrados

Estándar americano · Amfenol · Kohler · Oatey · SFA

Instantánea de capacidades

De un vistazo « Capacidades de fabricación de piezas de caucho personalizadas Engelhardt

[Instalación · Zhongshan ] 08 / 08 Especificaciones
ESPECIFICACIONES / 01 Procesos de moldeo Inyección/Compresión/Transferencia
ESPECIFICACIONES / 02 Equipos de vulcanización Más de 40 prensas (250T de vacío, 300T de inyección)
ESPECIFICACIONES / 03 Producción anual de caucho 2.000 Toneladas + 1.000 Toneladas de Silicona
ESPECIFICACIONES / 04 Especialidad en Materiales 8 Elastómeros (Neopreno, EPDM, Viton, Más)
ESPECIFICACIONES / 05 Estándares de calidad ISO 9001 + IATF 16949
ESPECIFICACIONES / 06 Capacidades de laboratorio 12+ instrumentos de prueba
ESPECIFICACIONES / 07 Tiempo de entrega de muestra 7-14 zile
ESPECIFICACIONES / 08 Fundado 2009 (más de 17 años de experiencia OEM)
Sección 01 · Riesgo y resolución de abastecimiento

Del dibujo de ingeniería a la producción en masa: Cómo resuelve Engelhardt el abastecimiento de caucho OEM

Un proveedor de piezas de caucho personalizadas se convierte en un riesgo de abastecimiento cuando la comunicación se ralentiza durante una parada de línea, las piezas no pasan la inspección entrante o los plazos de entrega indicados no pueden ser respaldados por la capacidad real. Tres preocupaciones prácticas surgen con mayor frecuencia en las conversaciones de adquisiciones con nuestro equipo de ingeniería:

DOLOR / 01

Riesgo de interrupción de la cadena de suministro

De proveedores de fuente única sin capacidad de respaldo.

DOLOR / 02

Deriva de calidad entre lotes

Cuando las especificaciones del material se interpretan de manera vaga.

DOLOR / 03

Painful Cronología de 8 a 12 semanas

Entre la aprobación del prototipo y la producción en masa total cuando un proveedor carece de capacidad de herramientas integradas.

Sección 02 · Resolución

Construido alrededor de esas tres restricciones

Nuestra empresa desarrolló su capacidad de fabricación de piezas de caucho personalizadas en torno a esas tres limitaciones. Nuestro Instalación de Zhongshan de 53.000 metros cuadrados corre Más de 40 prensas vulcanizadoras a través del moldeo por inyección, compresión y transferencia, para que un solo proveedor pueda absorber todo su volumen anual de caucho sin subcontratar a un socio que no haya auditado. El modelo integrado de montaje de caucho-plástico-hardware significa que un solo PO cubre juntas, carcasas de plástico, insertos de metal y subconjunto final cuando su especificación OEM necesita los cuatro. Certificación dual ISO 9001 y IATF 16949 “verificado por auditores automotrices independientes “aplica la misma disciplina de prevención de defectos a cada junta, sello o ojal de caucho personalizado Engelhardt que los OEM de nivel 1 de automóviles requieren para piezas críticas para la seguridad.

La mayor parte del riesgo de adquisición de caucho proviene de la variación compuesta entre lotes, no solo de la máquina de moldeo. Nuestro equipo se vincula doce instrumentos de laboratorio“incluido el viscosímetro Mooney, el reómetro de matriz móvil y la cámara de pulverización de sal en uno solo registro de trazabilidad por lotes que los clientes puedan solicitar un lote de producción específico, incluyendo registros históricos de producción de los tres años anteriores.

Equipo de Ingeniería de Calidad Engelhardt Tecnología de caucho y plástico Guangdong Engelhardt-Meitu
Capacidades de moldeo · Procesos internos

Servicios de moldeo de caucho personalizados: Inyección, compresión y transferencia

La pieza de caucho moldeado adecuada comienza con el proceso de moldeo correcto. Elegir la ruta incorrecta puede agregar costos de herramientas evitables, ciclos de curado más largos, trabajo de control de flash o deriva dimensional a lo largo del ciclo de vida del producto. Porque se ejecuta Engelhardt los tres procesos estándar de la industria internamente, nuestros ingenieros pueden recomendar el proceso que se ajuste a la geometría, la tolerancia, el volumen anual y el costo del ciclo de vida en lugar de forzar cada diseño en un solo conjunto de equipos.

Rubber injection molding machine for custom rubber parts
PROCESO / 01

Moldeo por inyección de caucho

Volumen más alto · Tolerancia más estricta
Máquinas de inyección de 300 toneladas
Tiempo de ciclo Más corto (escalado de gran volumen)
Tolerancia ±0,05 mm alcanzable
Flash Mínimo (compatible con automatización)
Mejor para

Geometrías complejas, paredes delgadas, más de 50.000 unidades anuales.

Rubber transfer molding setup for insert and bonded rubber parts
PROCESO / 02

Moldeo por transferencia de caucho

Insertar moldeo · Unión de precisión
Sistema de émbolo de molde cerrado
Tiempo de ciclo Medio
Tolerancia ±0,10 mm típico
Especialidad Apto para insertos (unión de caucho a metal)
Mejor para

Componentes con inserciones integradas, complejidad moderada.

Rubber compression molding press for large molded rubber parts
PROCESO / 03

Moldeo por compresión de caucho

Herramientas inferiores · Piezas grandes
Vulcanizadores al vacío de 250 toneladas
Tiempo de ciclo Longer (cure-driven)
Tolerancia ±0.25mm typical
Costo de herramientas Lowest of the three
Mejor para

Large, thick, simpler parts; low-to-medium volume.

Engineering Decision · Pre-Order Selection

Process Selection Is A Collective Engineering Effort

The process chosen is a collective engineering effort before an order is issued. When the part geometry, annual volume, and tolerance class lead to injection, we use injection. When tooling cost dominates the unit economics and tolerances are moderate, then compression is a sound proposition. Our engineers will not push a customer toward a $15,000 compression mold when a $40,000 injection mold will produce a significantly better product.

📐 Request a Process Selection Consultation

Share your drawing and annual volume; our engineering team returns a process recommendation with tooling cost estimate within 48 horas.

Data-Driven Supplier Benchmark

Engelhardt Vs U.S. Top 5 Rubber Manufacturers — Data-Driven Comparison

Most rubber molding companies publish two paragraphs about their practice and a quote form. This comparison was assembled from public service pages and certification disclosures of five established U.S. rubber manufacturers — Custom Rubber Corp, Qualiform, Aero Rubber Co, The Rubber Group and Timco Rubber — then filled in Engelhardt’s numbers from our 2024–2025 production records and certificate registry. Where a competitor does not publish a figure, “not disclosed” is the entry, because that opacity is itself the most useful signal a procurement manager can read.

Benchmark Matrix · 7 Dimensions × 6 Suppliers Engelhardt Not Disclosed Zero Disclosure
Dimensión
Engelhardt
Custom Rubber Corp
Qualiform
Aero Rubber Co
Timco Rubber
The Rubber Group
Facility Size
53,000 m²
not disclosed
not disclosed
not disclosed
not disclosed
not disclosed
Prensas vulcanizantes
40+
not disclosed
not disclosed
not disclosed
not disclosed
not disclosed
Producción anual de caucho
2,000 tons + 1,000 tons silicone
not disclosed
not disclosed
“B2B Volume”
not disclosed
not disclosed
Certificaciones
ISO 9001 + IATF 16949
“certifications” generic
ISO 9001:2015
ISO 9001:2015
not disclosed
not disclosed
Named OEM Customers
5 disclosed publicly
0
0
0
0
0
Lab Instruments Published
12+
0
0
0
0
0
One-Stop Integration
Rubber + Plastic + Hardware + Assembly
rubber only
rubber only
rubber only
rubber + plastic
rubber only
Why The Opacity Matters · IATF 16949

Public Data Gaps Should Be Treated As Supplier-Risk Signals

Public supplier data helps procurement teams decide which questions to ask before an RFQ. IATF 16949 is a stricter automotive quality framework than generic ISO 9001 because it adds requirements around defect prevention, error proofing, traceability, and warranty management. In this comparison, several U.S. suppliers do not publish facility scale, press count, production volume, or automotive-certification status. Engelhardt publishes those operating figures and can provide certificate details during supplier qualification.

⚖️ Request Comparison Brief

Request a Detailed Supplier Comparison Brief — we’ll build a custom side-by-side comparison using your shortlist of preferred U.S. suppliers and Engelhardt across the dimensions your sourcing team weighs most heavily.

Compound Library · 8 Elastomers

Eight Rubber Materials — Engelhardt Engineering Expertise By Application

Material choice is where most custom rubber projects thrive or self-destruct months after delivery. EPDM placed in oil exposure cracks within weeks. Neoprene attacked by strong acids degrades quickly. Silicone abraded against metal counterfaces wears faster than expected. Engelhardt’s engineering team supports material selection because we have run all eight elastomers below across 2,000-plus production programs and seen which compound fits which application.

Material
Durometer Range (Shore A)
Rango de temperatura
Chemical Resistance
Aplicaciones típicas

Neopreno

30A – 85A
−40°C to 110°C
Good oil and ozone resistance; vulnerable to strong acids and ketones
Automotive gaskets, weather seals, general-purpose seals

EPDM

40A – 90A
−40°C to 150°C
Excellent ozone, UV, and weather resistance; not for oils
Outdoor seals, automotive weatherstrips, HVAC gaskets

Vitón (FKM)

60A – 95A
−20°C to 230°C
Outstanding chemical and fuel resistance; high temperature
Aerospace seals, oil & gas seals, chemical processing

Silicone (LSR)

30A – 80A
−55°C to 230°C
Inert; food-grade and medical-grade variants available
Medical devices, food-contact seals, baby products

Nitrilo (NBR)

40A – 95A
−30°C to 120°C
Excellent oil, fuel, and solvent resistance
Hydraulic seals, automotive fuel system gaskets, O-rings

Butyl

40A – 75A
−40°C to 100°C
Outstanding air impermeability and vibration dampening
Inner tubes, anti-vibration mounts, pharmaceutical stoppers

Caucho natural

30A – 85A
−40°C to 80°C
High tensile strength; poor oil and ozone resistance
Shock absorbers, anti-vibration components, bushings

TPE

30A – 95A
−50°C to 130°C
Recyclable thermoplastic elastomer; broad chemical compatibility
Consumer products, medical grips, ergonomic components
Automotive Spec Language · ASTM D2000 / SAE J200

Where IATF 16949 Audit-Trail Traceability Begins

Customers who need automotive-spec material classification can quote against the ASTM D2000 line call-out system — for example, M2BC 507 A14 EO34 — and Engelhardt will match the type, class, hardness, tensile, and fluid-resistance code combination from our compound library. SAE J200 mirrors the same classification system for automotive applications. Working in this standardized specification language is faster than back-and-forth descriptive specs, and it is how IATF 16949 audit-trail traceability begins.

📋 Download the Materials & Tolerance Selection Guide PDF

18-page reference covering durometer-to-application matching, temperature compatibility tables, and ASTM D2000 line call-out worked examples.

Quality Assurance · 12-Instrument Lab

Quality Control: ISO 9001 + IATF 16949 With 12+ Laboratory Instruments

Most custom rubber parts manufacturers publish two lines about quality and a logo of one certification. We publish the full lab inventory because procurement teams who audit Chinese suppliers want to know exactly which test capabilities exist on site before a containerload of parts ships. We operate an in-house testing center built to international laboratory management standards, with twelve principal instruments covering compound characterization, physical property validation, environmental aging, and dimensional measurement.

Dual Certification: ISO 9001 + IATF 16949

Per industry authority DNV, IATF 16949 builds on ISO 9001 with additional automotive-sector requirements covering defect prevention, customer-specific requirements, variation reduction, and warranty management — and it extends to third-tier suppliers, design centers, distribution centers, and corporate headquarters. ISO 9001 alone is a generic ticket-to-trade across industries; IATF 16949 is the automotive equivalent benchmark. Engelhardt holds both, audited and renewed annually by independent certification bodies.

Twelve Laboratory Instruments — Compound, Physical, Environmental Testing

12 / 12 In-House
INST / 01

Mooney Viscometer

Compound viscosity per ASTM D1646 — incoming compound verification

INST / 02

Moving Die Rheometer (MDR UR-2010)

Cure curve, scorch, optimum cure time per ASTM D5289

INST / 03

Carbon Black Analyzer

Filler loading verification across batches

INST / 04

Material Testing Machine RT5K-2

Tensile, elongation, tear per ASTM D412 and D624

INST / 05

Kinematic Viscosity Meter

Oil-resistance test fluid characterization

INST / 06

Salt-Spray Corrosion Tester

Per ASTM B117 — metal-insert and bonded parts

INST / 07

Humidity Chamber

Tropical aging simulation per IEC 60068-2-78

INST / 08

High-Temperature Oven

Long-term thermal exposure validation

INST / 09

Heat Aging Test Chamber

Per ASTM D573 — 70-hour accelerated aging

INST / 10

Transportation Simulation Tester

EN, ANSI, UL, ASTM, ISTA, GB/T 4857 packaging tests

INST / 11

Projector (Optical) Measurement

2D dimensional verification on thin parts and elastomers

INST / 12

Chemical Laboratory

Compound formulation analysis and contamination screening

Lot-Level Batch Traceability — PPAP & AS9100 Compatible

Every production lot ships with a batch-traceability record linking the compound mixer run, cure cycle, dimensional inspection, and salt-spray or aging-test reports. Customers running IATF 16949 PPAP submissions or aerospace AS9100 quality systems can pull our lot records directly into their submission package.

🔬 Request a Plant & Lab Audit

Engelhardt welcomes in-person audits from procurement and quality teams; a digital pre-audit package is available immediately on request.

Customer Outcomes · Public Client List

Customer Outcomes: Tier-1 OEM Brands Trust Engelhardt

Many rubber suppliers describe customer trust in broad terms without naming the industries, qualification routes, or part families involved. Engelhardt lists selected OEM customer experience where public disclosure is appropriate, while NDA-covered project details are discussed only during supplier qualification. The procurement question is practical: has the supplier already worked through demanding qualification, traceability, and production-release requirements?

Selected OEM Customer Experience — Public Client List (gdengel.com)

05 / 05 Disclosed

American Standard

Plumbing fixtures

Amphenol

Electrical connectors

Kohler

Sanitary & kitchen

Oatey

Plumbing supplies

SFA

Aerospace lavatory

Four OEM Purchasing Profiles

Each Project: Different Process, Material, Certification & Tooling Match

These customers have four very different OEM rubber purchasing profiles: high-volume plumber-supply with food-grade silicone Certification (American Standard, Kohler, etc.), precisely dimensioned electrical-component seals with tight tolerances and IATF 16949 traceability (Amphenol), high-mix plumber-supply items running on cost-optimized compression molds (Oatey), and aerospace lavatory-subsystem parts requiring AS-grade documentation as well as our rubber output (SFA). Each project runs multi-year, multi-line, each requires a different match of process choice, material grade, certification audit trail, and tooling expenditure that directly addresses the customer’s procurement risk model.

📞 Request Reference Conversation

Qualified procurement teams can arrange a direct conversation with an Engelhardt customer-relationship manager about specific OEM program experience under NDA.

About Engelhardt-Meitu · Single-Vendor Integration

About Engelhardt: One-Stop Rubber, Plastic, Hardware, And Assembly Integration

Our company is a custom rubber parts manufacturer, but the larger Engelhardt-Meitu operation is defined by a single-vendor integration model that most rubber molding companies do not offer. From the same 53,000 m² Zhongshan campus, we run rubber, plastic, hardware, and assembly under a single system of quality, a single project manager, and a single PO. For OEMs whose finished good needs molded rubber gaskets, injection-molded plastic housing, stamped metal inserts, and final sub-assembly, that integration is one audit instead of four, one quality contract instead of four, and one set of dimensional interfaces checked at our factory before shipment instead of debugged on your assembly line.

Engelhardt rubber department with vulcanizing presses
DEPT / 01

Rubber Department

  • 40+ vulcanizing presses
  • 2,000 t/yr rubber + 1,000 t/yr silicone
  • Inyección 300T + Vacuum 250T
Engelhardt plastic injection molding department
DEPT / 02

Plastic Department

  • 400 injection machines
  • Largest 2,000-ton press
  • 100 tons/day plastic throughput
Engelhardt hardware stamping department
DEPT / 03

Hardware Department

  • 1,000 m² automated stamping line
  • 30M+ pieces annually
Engelhardt mold workshop and assembly area
DEPT / 04

Mold & Assembly

  • 3.600 m² mold workshop
  • German Rhodes machines, CNC, EDM
  • Integrated R+P+HW assembly
Integration Logic · Supply-Chain Risk Reduction

Single-vendor integration is not just operational simplicity. It is supply-chain risk reduction: when an OEM sources the rubber gasket, plastic housing, and metal insert from three different suppliers, the integration interfaces — bolt pattern matching, gasket compression height, hardware concentricity to the molded boss — become the OEM’s responsibility once delivered to the factory. When Engelhardt makes all three, those interfaces are checked at our factory before the parts leave the line.

Multi-Material OEM Program

Need More Than Just Custom Rubber Parts?

Engelhardt also runs plastic injection molding (up to 2,000-ton presses) y high-volume hardware manufacturing under the same quality system. Ask us about a fully integrated OEM sub-assembly program with one supplier.

Procurement Guide · Transparent Figures

Procurement Guide: Cost Drivers, Lead Time, MOQ, And Sample-To-Production Timeline

Most rubber molding companies publish nothing about how their pricing actually works, lead times, or payment terms. Procurement teams waste weeks getting quotes on parts that turn out to be out of MOQ or out of budget. We publish the figures listed below from our 2024–2025 program deliveries.

Five Pricing Drivers (Custom Rubber Parts)

DRIVER / 01

Material Grade

Top-tier FKM/Viton cost three to five times more than neoprene.

DRIVER / 02

Number Of Cavities & Tooling Complexity

Single-cavity vs 32-cavity molds rango 20–40× in price.

DRIVER / 03

Annual Order Volume

Quasi-annual material-usage or actual annual quoting, plus actual order volume. Consistent.

DRIVER / 04

Clase de tolerancia

0.05mm tight injection vs 0.25mm loose compression.

DRIVER / 05

Certification Formalization

Commercial grade vs IATF 16949 audit-clearance.

Lead Time & Sample-To-Production Timeline

01
7-14 zile

Sample

T1 from existing compound

02
3–4 Weeks

Prototipo

T2 with PPAP-style documentation

03
4–6 Weeks

Tooling Fabrication

 

04
4–8 Weeks

First Mass Prod Start

After tool approval

05
3–5 Weeks

Ongoing Production Releases

From PO

Payment Terms & Shipping

  • 01 Standard: 30% deposit / 70% balance before shipment
  • 02 Methods: LC at sight or TT (telegraphic transfer)
  • 03 Shipping terms: FOB Shenzhen or Guangzhou, CIF to buyer port, or EXW factory / nominated freight forwarder
  • 04 Currency: USD, EUR, RMB invoicing available

MOQ & Tooling Policy

  • 01 Standard catalog items: 500–1,000 pieces typical MOQ
  • 02 Custom molded parts: MOQ negotiable based on tooling amortization
  • 03 Tooling ownership: customer-owned tooling supported; existing tooling transfer welcomed
  • 04 Sample fee: applied to the first production order on PO confirmation
Complete-System Quotation · 24h Turnaround

Request A Complete-System Quotation

Including tooling cost, sample fee, and shipping estimate. Quotes returned within 24 hours during business days.

FAQ · Procurement & Engineering

Pregunta frecuente Questions

07 Common
Questions
Q / 01

How Much Do Custom Rubber Parts Cost From Engelhardt?

Custom rubber parts pricing depends on five drivers: material grade (Neoprene vs Viton can differ 3-5× per kg), cavity count and tooling complexity (single-cavity vs 32-cavity differ 20-40× in tooling), annual volume tier, tolerance class, and certification requirement. We do not publish a flat price list because doing so misleads buyers — your part with your specification needs a custom quote built around your actual production economics. Request a quotation through the form above and you will receive a complete-system breakdown within 24 hours, including tooling, sample, and shipping estimate.

Q / 02

What Is The Lead Time From Drawing To Mass Production?

From a confirmed PO and approved drawing: samples in 7-14 days using existing compound, prototype with PPAP-style validation in 3-4 weeks, tooling fabrication 4-6 weeks, and first mass production lot 4-8 weeks after tooling approval. Ongoing production releases run 3-5 weeks from each subsequent PO. Air freight from Guangzhou or Shenzhen typically adds 5-7 days; ocean freight 25-35 days to most U.S. and European ports.

Q / 03

Which Rubber Material Should I Choose For My Application?

Material selection follows three questions: what temperature range will the part see in service, what fluids will it contact, and what mechanical loading does it carry. EPDM excels outdoors but fails in oil. Nitrile excels in fuel but degrades under UV. Viton handles high temperature and aggressive chemicals at premium cost. Silicona serves food and medical at moderate cost. Our engineering team supports the selection conversation before quoting, and the Materials and Tolerance Selection Guide PDF available above includes durometer matching, temperature compatibility, and ASTM D2000 line call-out worked examples.

Q / 04

Can Engelhardt Manufacture Custom Rubber Parts To IATF 16949 Automotive Standards?

Yes. Engelhardt holds active IATF 16949 certification audited and renewed annually by an independent certification body, in addition to ISO 9001. IATF 16949 extends the ISO 9001 quality management framework with automotive-specific requirements around defect prevention, error proofing, customer-specific requirements, control plan governance, and warranty management. Per certification authority DNV, IATF 16949 is the automotive equivalent ticket-to-trade and extends down to third-tier automotive suppliers, design centers, and corporate headquarters. We support full PPAP submissions including PSW, control plans, process flow diagrams, dimensional layouts, material certifications, performance test reports, and capability studies — the level of documentation an automotive Tier-1 OEM expects from a qualified rubber molding supplier. Customer audits at our Zhongshan facility are welcome and typically scheduled within two weeks of the request.

Q / 05

Do You Supply Prototypes, Small-Batch Orders, And Full Mass Production?

Yes to all three. Samples ship in 7-14 days on existing compounds. Small-batch MOQ is typically 500-1,000 pieces for catalog items. Mass production scales from 10,000 to several million pieces per year, with custom-tool MOQ negotiable based on amortization.

Q / 06

What Is The Difference Between Injection, Compression, And Transfer Rubber Molding?

Moldeo por inyección heats and plasticizes the elastomer before injecting it into a closed mold cavity under high pressure — fastest cycle, tightest tolerance, highest tooling cost, best for high-volume complex parts. Moldeo por compresión places a measured preform into an open heated mold that closes under pressure — lowest tooling cost, longest cycle, moderate tolerance, best for large or thick parts at low-to-medium volume. Moldeo por transferencia uses a plunger to push rubber through sprues into closed cavities — middle ground, particularly strong for insert molding and rubber-to-metal bonding. The right choice depends on geometry, volume, tolerance, and lifecycle cost.

Q / 07

Do You Also Offer Plastic Injection Molding And Hardware Manufacturing?

Yes. The broader Engelhardt-Meitu operation runs 400 plastic injection machines (largest 2,000-ton presses, 100 tons/day plastic throughput) and a 1,000-square-meter automated hardware stamping line producing 30 million-plus pieces annually. The modelo integrado de montaje de caucho-plástico-hardware means an OEM with a multi-material sub-assembly can source the rubber gasket, plastic housing, metal insert, and final sub-assembly from a single supplier under one quality system and one PO. See the Engelhardt main capability pages for plastic and hardware sub-services.