---
title: "Ruiqin D-Type Star Lock Washer and Cap Nut Set"
description: "Ruiqin D-Type Star Lock Washer and Cap Nut Set — Assortment Kits & Mixed Fastener Sets. Material: Stainless Steel. MOQ 500 pieces, US$0.012 – 0.024."
url: https://engineeringhardware.com/product/ruiqin-d-type-star-lock-washer-and-cap-nut-set/
source: Engineering Hardware & Fasteners
---

# Ruiqin D-Type Star Lock Washer and Cap Nut Set

[![Ruiqin D-Type Star Lock Washer and Cap Nut Set](https://img.engineeringhardware.com/Ruiqin-D-Type-Star-Lock-Washer-and-Cap-Nut-Set.webp)](https://img.engineeringhardware.com/Ruiqin-D-Type-Star-Lock-Washer-and-Cap-Nut-Set.webp)

- Standard & made-to-drawing parts
- Checked before shipping
- Air, sea & express delivery

[Fastener Sets & Assemblies › Assortment Kits & Mixed Fastener Sets](https://engineeringhardware.com/fastener-products/fastener-sets-assemblies/assortment-kits-mixed-fastener-sets/)

Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/ruiqin-d-type-star-lock-washer-and-cap-nut-set.md)

Model no. **Cap-Nuts (D-Type) Star lock Washer**

US$0.012 – 0.024 / piece

MOQ 500 pieces · Final price confirmed in your quote

- **Material:** Stainless Steel
- **Surface Treatment:** Passivated/Zinc Platedplated
- **Standard:** DIN / Customized Non-Standard
- **Package Size:** 20.00cm * 10.00cm * 10.00cm

Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Ruiqin%20D-Type%20Star%20Lock%20Washer%20and%20Cap%20Nut%20Set%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fruiqin-d-type-star-lock-washer-and-cap-nut-set%2F)

Specifications are as listed for this product. Engineering Hardware & Fasteners confirms ratings, mating parts, compatibility, packing and lead time with you before you order.

## Specifications

| Customization | Available |
| --- | --- |
| Type | Lock Washer |
| Material | Stainless Steel |
| Model NO. | Cap-Nuts (D-Type) Star lock Washer |
| Combination Washer Structure | A Type |
| Combination Washer Packaging | All Inclusive |
| Spring Washer Type | Standard |
| Surface Treatment | Passivated/Zinc Platedplated |
| OEM/ODM | Yes |
| Delivery Time | 7-15 Days |
| Production Proce | Stamping/Precision Forming |
| Standard | DIN / Customized Non-Standard |
| Load Capacity | High Tensile |
| Test Reports | Material/Salt Spray Test Reports/ SGS/RoHS |
| Transport Package | Plastic Bag + Carton Box + Pallet |
| Specification | M1.6-M25 |
| Origin | China (Zhengjiang) |
| HS Code | 7301100000 |
| Production Capacity | 200000000piece/Years |
| Package Size | 20.00cm * 10.00cm * 10.00cm |
| Package Gross Weight | 5.000kg |
| Palletization | Cartons stacked on wooden pallets , wrapped with PE stretch film, corner guards and load stabilizers applied. |
| Customizable | Adjust bag quantities, carton sizes/printing, pallet materials upon request. |
| Low Damage Rate | Multi-layer protection minimizes transit risks. |
| Required documents | 1. Damage photos at destination |
| Category | [Assortment Kits & Mixed Fastener Sets](https://engineeringhardware.com/fastener-products/fastener-sets-assemblies/assortment-kits-mixed-fastener-sets/) |

## Technical parameters

| Material | Description & Applications |
| --- | --- |

| 65Mn Steel | High carbon steel with excellent hardness and wear resistance. Commonly used for springs, tools, and automotive parts requiring high strength and durability. |
| --- | --- |

| 316 Stainless Steel | Austenitic stainless steel known for its exceptional corrosion resistance, especially in marine and chemical environments. Ideal for food processing, pharmaceuticals, and marine applications. |
| --- | --- |

| 304 Stainless Steel | The most widely used stainless steel with good corrosion resistance, formability, and weldability. Commonly used in kitchen equipment, architectural applications, and chemical industries. |
| --- | --- |

| Carbon Steel (Q235) | Low-carbon steel with good weldability and strength. Widely used in construction, automotive, and manufacturing industries for structural components. |
| --- | --- |

| Alloy Steel (4140) | Medium-carbon steel alloyed with chromium and molybdenum, offering high strength and toughness. Common in manufacturing of shafts, gears, and heavy-duty machinery parts. |
| --- | --- |

| Brass | Copper-zinc alloy known for its machinability and corrosion resistance. Used in plumbing, electrical components, and decorative items. |
| --- | --- |

| Aluminum | Lightweight metal with good corrosion resistance, used in aerospace, automotive, and construction industries for components requiring strength-to-weight ratio. |
| --- | --- |

| Titanium | Known for high strength, low weight, and excellent corrosion resistance, especially in aerospace, medical implants, and high-performance applications. |
| --- | --- |

| Surface Treatment | Description & Applications |
| --- | --- |

| Dacromet | A chrome-free zinc coating offering excellent corrosion resistance. Suitable for automotive and industrial equipment exposed to harsh environments. |
| --- | --- |

| Galvanizing (Zinc Plating) | Zinc coating applied through electroplating or hot-dip, providing strong corrosion protection. Common in construction, outdoor machinery, and pipelines. |
| --- | --- |

| Black Oxide (Blackening) | A chemical oxidation process that creates a black, protective layer on steel. Ideal for mechanical parts, automotive components, and tools where appearance and corrosion resistance are important. |
| --- | --- |

| Zinc-Chromate Coating | A zinc coating with added chromium for enhanced corrosion resistance. Used in aerospace, and high-performance applications. |
| --- | --- |

| Nickel Plating | A nickel coating providing high hardness and excellent corrosion resistance, with a smooth surface. Used in electronics, precision parts, and industrial applications requiring high gloss and protection. |
| --- | --- |

| Phosphating | A process that forms a phosphate layer on the metal surface, improving adhesion and corrosion resistance. Used in automotive and machinery applications requiring good paint adhesion. |
| --- | --- |

| Aluminum Spraying | A coating of aluminum sprayed onto steel surfaces for heat and corrosion resistance. Used in high-temperature environments like boilers and engines. |
| --- | --- |

| Passivation | A process that enhances the corrosion resistance of stainless steel or aluminum by creating a protective oxide layer. Common in food processing, pharmaceutical, and medical equipment. |
| --- | --- |

| Coating (Polymer, Resin) | A thin film of polymers (e.g., polyurethane, epoxy) applied to the surface for corrosion resistance and wear protection. Used in electronics, appliances, and architectural applications. |
| --- | --- |

| Shaft (mm) | M1.6 | M2 | M2.4 | M3 | M4 | M4.8 | M5 | M6 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Inner (d1, mm) | 1.23 - 1.46 | 1.61 - 1.84 | 2.02 - 2.25 | 2.58 - 2.81 | 3.57 - 3.8 | 4.31 - 4.53 | 4.51 - 4.74 | 5.45 - 5.7 |
| Outer (D, mm) | 10.6 | 10.6 | 10.6 | 10.6 | 12.4 | 12.4 | 12.4 | 16.2 |
| Height (H + 0.3 mm) | 3 | 3 | 3 | 3 | 3.8 | 3.8 | 3.8 | 5 |
| Material thickness (max, mm) | 2.5 | 2.5 | 2.5 | 2.5 | 3 | 3 | 3 | 4 |
| Number of slots | 4 | 4 | 4 | 4 | 5 | 6 | 6 | 6 |
| Trigger force (ca. N) | 200 | 200 | 200 | 200 | 400 | 400 | 400 | 800 |
| Shaft (mm) | M6.35 | M7 | M8 | M9 | M9.5 | M10 | M11 | M12 |
| Inner (d1, mm) | 5.83 - 6.08 | 6.46 - 6.72 | 7.4 - 7.66 | 8.5 - 8.75 | 9 - 9.26 | 9.49 - 9.74 | 10.5 - 10.76 | 11.37 - 11.62 |
| Outer (D, mm) | 16.2 | 16.2 | 16.2 | 19.7 | 19.7 | 19.7 | 19.7 | 26 |
| Height (H + 0.3 mm) | 5 | 5 | 5 | 5.9 | 5.9 | 5.9 | 5.9 | 7.5 |
| Material thickness (max, mm) | 4 | 4 | 4 | 4.5 | 4.5 | 4.5 | 4.5 | 6 |
| Number of slots | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Shaft (mm) | M12.7 | M13 | M14 | M15 | M16 | M17 | M18 | M19 |
| Inner (d1, mm) | 12.1 - 12.36 | 12.38 - 12.64 | 13.40 - 13.66 | 14.43 - 14.68 | 15.28 - 15.53 | 16.42 - 16.68 | 17.34 - 17.62 | 18.4 - 18.69 |
| Outer (D, mm) | 26 | 26 | 29.4 | 29.4 | 29.4 | 29.4 | 38.2 | 38.2 |
| Height (H + 0.3 mm) | 7.5 | 7.5 | 9 | 9 | 9 | 9 | 11.7 | 11.7 |
| Material thickness (max, mm) | 6 | 6 | 7 | 7 | 7 | 7 | 8.7 | 8.7 |
| Number of slots | 6 | 6 | 6 | 6 | 6 | 6 | 9 | 9 |
| Shaft (mm) | M20 | M21 | M22 | M23 | M24 | M25 |  |  |
| Inner (d1, mm) | 19.3 - 19.63 | 20.33 - 20.61 | 21.37 - 21.65 | 22.34 - 22.62 | 23.33 - 23.66 | 24.3 - 24.63 |  |  |
| Outer (D, mm) | 38.2 | 38.2 | 38.2 | 39.8 | 43 | 43 |  |  |
| Height (H + 0.3 mm) | 11.7 | 11.7 | 11.7 | 13 | 12.5 | 12.5 |  |  |
| Material thickness (max, mm) | 8.7 | 8.7 | 8.7 | 9.5 | 9.5 | 9.5 |  |  |
| Number of slots | 9 | 9 | 9 | 9 | 9 | 9 |  |  |

| Category | Advantages |
| --- | --- |

| Production Capabilities | - 20+ Years Expertise: Specialized in precision washer production since 2005 - Scalable Capacity: 1,800+ sqm facility with 30+ automated production - Annual Output: 200 million+ pieces (consistent quality control) - Rapid Prototyping: 24-hour sample service with 3-day mass production turnaround - Flexible MOQ: Support trial orders from 500pcs to million-piece bulk orders |
| --- | --- |

| Quality Assurance | - Precision Tolerance: ±0.1mm accuracy maintained through CNC control - 3-Stage Inspection: Full-process QC from raw materials → production → shipment - Traceability System: Batch number tracking for all products |
| --- | --- |

| Customization Services | - Material Options: Stainless steel (304/316), carbon steel, brass, copper, etc. - Surface Treatments: Zinc plating, nickel plating, passivation, Dacromet, etc. - Technical Support: Dedicated engineers for product selection solutions - CAD Compatibility: Direct tooling from customer CAD files |
| --- | --- |

| Supply Chain Strengths | - Direct Material Procurement: Partnership with tier-1 steel mills - Safety Stock: Maintain 300+ metric tons of ready-to-ship inventory - Dual-Shift Production: 40+ skilled workers ensuring stable capacity - Price Stability: Seasonal procurement plans to buffer material fluctuations |
| --- | --- |

| Logistics Services | - Global Shipping: Established partnerships with DHL, FedEx, and ocean freight forwarders - Express Delivery: 48-hour dispatch for standard products - Production Transparency: Available real-time workshop video updates - Bilingual Support: Technical documentation in English/Chinese |
| --- | --- |

| Cost Advantages | - 15-20% Cost Savings: Achieved through vertical integration & automation - Mold Efficiency: 30% faster die changeover than industry average - Material Utilization: 99% efficiency through optimized nesting |
| --- | --- |

| Category | FAQ |
| --- | --- |
| Production & Ordering |  |
| 1. Minimum Order Quantity (MOQ) | - Standard washers: 500 pcs - Custom designs: 5,000 pcs (depends on complexity) |
| 2. Sample Policy | - Standard items: Free samples (customer pays shipping) - Custom items: Sample fee (deductible from bulk orders) |
| 3. Sample Lead Time | - Existing tooling: 24 hours + shipping - New tooling: 3-5 business days |
| 4. Tooling Costs | - Simple dies: $110-275/set - Complex tooling: Quoted based on CAD design |
| Technical Specifications |  |
| 5. Dimensional Tolerance | - Standard: ±0.1mm - Precision: ±0.05mm (+20% surcharge) |
| 6. Material Options |  |
| 7. Surface Finishes | - Plating: Zinc/Nickel (48-96 hours salt spray resistance) - Specialty: Dacromet (1000+ hours corrosion resistance) |
| Quality Assurance |  |
| 8. Production Monitoring | - Real-time workshop video access - Daily progress reports |
| 9. Quality Issue Resolution | - 48-hour response guarantee - Priority replacement shipping |
| 10. Audit Compliance | - Accepts SGS audits - Requires 2-week advance notice |
| Commercial Terms |  |
| 11. Payment Terms | - New clients: 30% deposit, 70% before shipment - Approved accounts: O/A 30 days |
| 12. Production Capacity | - Base capacity: 15M pcs/month - Maximum capacity: 20M pcs/month (with advance notice) |
| 13. Toll Processing | - Accepted (material certificates required) - 3% material overage required |
| Logistics & Support |  |
| 14. Expedited Orders | - 48-hour rush service (+15% fee) - Priority stock allocation |
| 15. Export Documentation | - Commercial Invoice - Packing List - Certificate of Origin |
| 16. Quality Certificates | - Dimensional inspection report - Salt spray test results - Material composition analysis |
| Value-Added Services |  |
| 17. Packaging Options | - Carton packaging - Pallet packaging - Bulk packaging |
| 18. Damage Claims | Required documents: 1. Damage photos at destination 2. Carrier inspection report (Processed within 72 hours) |
| 19. Insurance Coverage | - $700,000 product liability per incident - Global coverage |

## Description

Ruiqin D-Type Star Lock Washer and Cap Nut Set is part of our assortment kits & mixed fastener sets range (Fastener Sets & Assemblies).

### Key details

- **Type:** Lock Washer
- **Standard:** DIN / Customized Non-Standard
- **Material:** Stainless Steel
- **Surface Treatment:** Passivated/Zinc Platedplated
- **Combination Washer Structure:** A Type
- **Combination Washer Packaging:** All Inclusive
- **Spring Washer Type:** Standard
- **OEM/ODM:** Yes

Available configurations include material, surface treatment, standard and package size. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request.

### Ordering through Engineering Hardware & Fasteners

Minimum order is 500 pieces at US$0.012 – 0.024 per piece. Send one inquiry with the part number, quantity and destination, and Engineering Hardware & Fasteners confirms size, thread, material, grade, finish, price, lead time and shipping, checks the goods before dispatch and ships them to you.

## Frequently asked questions

### What is the minimum order quantity (MOQ) for Ruiqin D-Type Star Lock Washer and Cap Nut Set?

The listed minimum order is 500 pieces, at US$0.012 – 0.024 per piece. Smaller trial quantities or samples can be requested in your inquiry; Engineering Hardware & Fasteners confirms what is possible for your size.

### What are the main specifications of Ruiqin D-Type Star Lock Washer and Cap Nut Set?

Type: Lock Washer; Standard: DIN / Customized Non-Standard; Material: Stainless Steel; Surface Treatment: Passivated/Zinc Platedplated; Combination Washer Structure: A Type; Combination Washer Packaging: All Inclusive. The full specification table and any technical parameter tables are listed on this page.

### Can this product be customized (OEM)?

Listed configurations include material, surface treatment, standard and package size. Size, thread, length, material and grade, surface finish, head marking, packaging and labels can be quoted to your specification or drawing.

### What is the lead time and how is it shipped?

Lead time depends on quantity and customization and is confirmed in your quote. Engineering Hardware & Fasteners checks the goods before dispatch and ships by express, air or sea; mixed orders can be consolidated in one shipment.

### Which other assortment kits & mixed fastener sets are available?

The Assortment Kits & Mixed Fastener Sets category lists 3,161 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/fastener-sets-assemblies/assortment-kits-mixed-fastener-sets/](https://engineeringhardware.com/fastener-products/fastener-sets-assemblies/assortment-kits-mixed-fastener-sets/)

How we work

## Specified, checked and shipped by Engineering Hardware & Fasteners

Engineering Hardware & Fasteners supplies bolts, screws, nuts, washers, anchors, rivets and fastening hardware to equipment makers, contractors, distributors and maintenance teams. Orders go through one controlled process: size, thread, material, grade and finish confirmed, samples approved, dimensions, thread fit and plating checked before packing, then packed for export — standard or made to drawing.

- DIN, ISO, ASTM, ANSI, JIS and GB standard parts
- Non-standard parts made to your drawing
- Dimensions, thread gauges and plating checked before packing
- Export cartons and pallets, consolidated mixed orders
- Samples available for approval before mass production

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Production floor

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Inspection bench

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Sorting & packing

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Parts warehouse

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Sample review

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Sales office

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## Request a quote for this product

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