| Customization: | Available |
|---|---|
| Material: | Stainless Steel/Carbon Steel |
| Usage: | Furniture, Automobile, Industrial |
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Our DIN 472 Internal Retaining Rings for Bores - Normal Type are precision-engineered components designed to securely retain parts inside cylindrical housings or bores. Made from high-quality carbon steel or stainless steel, and available with black oxide or phosphate finishes, these circlips offer excellent strength, wear resistance, and corrosion protection. Compliant with international standards such as DIN 472 and GB893, they ensure reliable axial retention of components like bearings, gears, and pulleys in a wide range of industrial applications. Easy to install and remove, these internal circlips are widely used in automotive, machinery, and mechanical assemblies where consistent performance and secure fastening are essential.
Secure Axial Retention: Designed to hold components firmly within bores, preventing axial movement under load.
High Precision & Standard Compliance: Manufactured according to DIN 472 / GB893, ensuring dimensional accuracy and interchangeability.
Durable Material Options: Available in high-quality carbon steel and stainless steel for strength and corrosion resistance.
Surface Treatments: Optional black oxide or phosphate coatings for enhanced wear and rust protection.
Easy Installation and Removal: Normal Type design allows for simple fitting and disassembly using standard circlip tools.
Wide Range of Sizes: Suitable for various bore diameters, meeting different engineering and mechanical requirements.
Automotive Industry: Commonly used to retain bearings, seals, and bushings in gearboxes, engines, and other vehicle systems.
Industrial Machinery: Ensures secure component positioning in pumps, motors, compressors, and rotating equipment.
Mechanical Assemblies: Ideal for use in devices requiring internal retention within cylindrical housings.
Electrical Equipment: Applied in electric motors and control systems for component stability and reliability.
Aerospace and Precision Equipment: Used in high-reliability environments where component shifting must be strictly avoided.
Common Materials and Their Applications in Industrial Components
| 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. |
| Nominal Diameterd | 8 | 9 | 10 | 11 | 12 | 13 | 14 | |
| s | max | 0.8 | 0.8 | 1 | 1 | 1 | 1 | 1 |
| min | 0.75 | 0.75 | 0.94 | 0.94 | 0.94 | 0.94 | 0.94 | |
| dc | max | 9.06 | 10.16 | 11.16 | 12.16 | 13.36 | 14.46 | 15.46 |
| min | 8.6 | 9.7 | 10.7 | 11.7 | 12.9 | 14 | 15 | |
| a | max | 2.4 | 2.5 | 3.2 | 3.3 | 3.4 | 3.6 | 3.7 |
| b | ≈ | 1.1 | 1.3 | 1.4 | 1.5 | 1.7 | 1.8 | 1.9 |
| d1 | min | 1 | 1 | 1.2 | 1.2 | 1.5 | 1.5 | 1.7 |
| d2 | 3 | 3.7 | 3.3 | 4.1 | 4.9 | 5.4 | 6.2 | |
| per 1000 units ≈ kg | 0.14 | 0.15 | 0.18 | 0.31 | 0.37 | 0.42 | 0.52 | |
| Nominal Diameterd | 15 | 16 | 17 | 18 | 19 | 20 | 21 | |
| s | max | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| min | 0.94 | 0.94 | 0.94 | 0.94 | 0.94 | 0.94 | 0.94 | |
| dc | max | 16.56 | 17.66 | 18.72 | 19.92 | 20.92 | 21.92 | 22.92 |
| min | 16.1 | 17.2 | 18.17 | 19.37 | 20.37 | 21.37 | 22.37 | |
| a | max | 3.7 | 3.8 | 3.9 | 4.1 | 4.1 | 4.2 | 4.2 |
| b | ≈ | 2 | 2 | 2.1 | 2.2 | 2.2 | 2.3 | 2.4 |
| d1 | min | 1.7 | 1.7 | 1.7 | 2 | 2 | 2 | 2 |
| d2 | 7.2 | 8 | 8.8 | 9.4 | 10.4 | 11.2 | 12.2 | |
| per 1000 units ≈ kg | 0.56 | 0.6 | 0.65 | 0.74 | 0.83 | 0.9 | 1 | |
| Nominal Diameterd | 22 | 24 | 25 | 26 | 28 | 30 | 31 | |
| s | max | 1 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 |
| min | 0.94 | 1.14 | 1.14 | 1.14 | 1.14 | 1.14 | 1.14 | |
| dc | max | 23.92 | 26.32 | 27.32 | 28.32 | 30.6 | 32.6 | 33.9 |
| min | 23.37 | 25.69 | 26.69 | 27.69 | 29.85 | 31.85 | 33.15 | |
| a | max | 4.2 | 4.4 | 4.5 | 4.7 | 4.8 | 4.8 | 5.2 |
| b | ≈ | 2.5 | 2.6 | 2.7 | 2.8 | 2.9 | 3 | 3.2 |
| d1 | min | 2 | 2 | 2 | 2 | 2 | 2 | 2.5 |
| d2 | 13.2 | 14.8 | 15.5 | 16.1 | 17.9 | 19.9 | 20 | |
| per 1000 units ≈ kg | 1.1 | 1.42 | 1.5 | 1.6 | 1.8 | 2.06 | 2.1 | |
| Nominal Diameterd | 32 | 34 | 35 | 36 | 37 | 38 | 40 | |
| s | max | 1.2 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.75 |
| min | 1.14 | 1.44 | 1.44 | 1.44 | 1.44 | 1.44 | 1.69 | |
| dc | max | 34.9 | 37 | 38.3 | 39.3 | 40.3 | 41.3 | 44.4 |
| min | 34.15 | 36.25 | 37.55 | 38.55 | 39.55 | 40.55 | 43.11 | |
| a | max | 5.4 | 5.4 | 5.4 | 5.4 | 5.5 | 5.5 | 5.8 |
| b | ≈ | 3.2 | 3.3 | 3.4 | 3.5 | 3.6 | 3.7 | 3.9 |
| d1 | min | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 |
| d2 | 20.6 | 22.6 | 23.6 | 24.6 | 25.4 | 26.4 | 27.8 | |
| per 1000 units ≈ kg | 2.21 | 3.2 | 3.54 | 3.7 | 3.74 | 3.9 | 4.7 | |
| Nominal Diameterd | 42 | 45 | 47 | 48 | 50 | 52 | 55 | |
| s | max | 1.75 | 1.75 | 1.75 | 1.75 | 2 | 2 | 2 |
| min | 1.69 | 1.69 | 1.69 | 1.69 | 1.93 | 1.93 | 1.93 | |
| dc | max | 46.4 | 49.4 | 51.6 | 52.6 | 55.3 | 57.3 | 60.3 |
| min | 45.11 | 48.11 | 50.04 | 51.04 | 53.74 | 55.74 | 58.74 | |
| a | max | 5.9 | 6.2 | 6.4 | 6.4 | 6.5 | 6.7 | 6.8 |
| b | ≈ | 4.1 | 4.3 | 4.4 | 4.5 | 4.6 | 4.7 | 5 |
| d1 | min | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 |
| d2 | 29.6 | 32 | 33.5 | 34.5 | 36.3 | 37.9 | 40.7 | |
| per 1000 units ≈ kg | 5.4 | 6 | 6.1 | 6.7 | 7.3 | 8.2 | 8.3 | |
| Nominal Diameterd | 56 | 58 | 60 | 62 | 63 | 65 | 68 | |
| s | max | 2 | 2 | 2 | 2 | 2 | 2.5 | 2.5 |
| min | 1.93 | 1.93 | 1.93 | 1.93 | 1.93 | 2.43 | 2.43 | |
| dc | max | 61.3 | 63.3 | 65.3 | 67.3 | 68.3 | 70.3 | 73.6 |
| min | 59.74 | 61.74 | 63.74 | 65.74 | 66.74 | 68.74 | 72.04 | |
| a | max | 6.8 | 6.9 | 7.3 | 7.3 | 7.3 | 7.6 | 7.8 |
| b | ≈ | 5.1 | 5.2 | 5.4 | 5.5 | 5.6 | 5.8 | 6.1 |
| d1 | min | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 3 | 3 |
| d2 | 41.7 | 43.5 | 44.7 | 46.7 | 47.7 | 49 | 51.6 | |
| per 1000 units ≈ kg | 8.7 | 10.5 | 11.1 | 11.2 | 12.4 | 14.3 | 16 | |
| Nominal Diameterd | 70 | 72 | 75 | 78 | 80 | 82 | 85 | |
| s | max | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 3 |
| min | 2.43 | 2.43 | 2.43 | 2.43 | 2.43 | 2.43 | 2.92 | |
| dc | max | 75.6 | 77.6 | 80.6 | 83.8 | 86.8 | 88.8 | 91.8 |
| min | 74.04 | 76.04 | 79.04 | 81.96 | 84.96 | 86.96 | 89.96 | |
| a | max | 7.8 | 7.8 | 7.8 | 8.5 | 8.5 | 8.5 | 8.6 |
| b | ≈ | 6.2 | 6.4 | 6.6 | 6.8 | 7 | 7 | 7.2 |
| d1 | min | 3 | 3 | 3 | 3 | 3 | 3 | 3.5 |
| d2 | 53.6 | 55.6 | 58.6 | 60.1 | 62.1 | 64.1 | 66.9 | |
| per 1000 units ≈ kg | 16.5 | 18.1 | 18.8 | 20.4 | 22 | 24 | 25.3 | |
| Nominal Diameterd | 88 | 90 | 92 | 95 | 98 | 100 | 102 | |
| s | max | 3 | 3 | 3 | 3 | 3 | 3 | 4 |
| min | 2.92 | 2.92 | 2.92 | 2.92 | 2.92 | 2.92 | 3.9 | |
| dc | max | 94.8 | 96.8 | 98.8 | 101.8 | 104.8 | 106.8 | 109.3 |
| min | 92.96 | 94.96 | 96.96 | 99.96 | 102.96 | 104.96 | 107.46 | |
| a | max | 8.6 | 8.6 | 8.7 | 8.8 | 9 | 9.2 | 9.5 |
| b | ≈ | 7.4 | 7.6 | 7.8 | 8.1 | 8.3 | 8.4 | 8.5 |
| d1 | min | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 |
| d2 | 69.9 | 71.9 | 73.7 | 76.5 | 79 | 80.6 | 82 | |
| per 1000 units ≈ kg | 28 | 31 | 32 | 35 | 37 | 38 | 55 | |
| Nominal Diameterd | 105 | 108 | 110 | 112 | 115 | 120 | 125 | |
| s | max | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| min | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | |
| dc | max | 113.3 | 116.3 | 118.3 | 120.3 | 123.5 | 128.5 | 133.5 |
| min | 111.46 | 114.46 | 116.46 | 118.46 | 121.37 | 126.37 | 131.37 | |
| a | max | 9.5 | 9.5 | 10.4 | 10.5 | 10.5 | 11 | 11 |
| b | ≈ | 8.7 | 8.9 | 9 | 9.1 | 9.3 | 9.7 | 10 |
| d1 | min | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 4 |
| d2 | 85 | 88 | 88.2 | 90 | 93 | 96.9 | 101.9 | |
| per 1000 units ≈ kg | 56 | 60 | 64.5 | 72 | 74.5 | 77 | 79 | |
| Nominal Diameterd | 130 | 135 | 140 | 145 | 150 | 155 | 160 | |
| s | max | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| min | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | |
| dc | max | 138.5 | 143.5 | 148.5 | 153.5 | 159.5 | 165.5 | 170.5 |
| min | 136.37 | 141.37 | 146.37 | 151.37 | 157.37 | 163.37 | 168.37 | |
| a | max | 11 | 11.2 | 11.2 | 11.4 | 12 | 12 | 13 |
| b | ≈ | 10.2 | 10.5 | 10.7 | 10.9 | 11.2 | 11.4 | 11.6 |
| d1 | min | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| d2 | 106.9 | 111.5 | 116.5 | 121 | 124.8 | 129.8 | 132.7 | |
| per 1000 units ≈ kg | 82 | 84 | 87.5 | 93 | 105 | 107 | 110 | |
| Nominal Diameterd | 165 | 170 | 175 | 180 | 185 | 190 | 195 | |
| s | max | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| min | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | |
| dc | max | 176 | 181 | 186.2 | 191.2 | 196.2 | 201.2 | 206.2 |
| min | 173.87 | 178.87 | 183.78 | 188.78 | 193.78 | 198.78 | 203.78 | |
| a | max | 13 | 13.5 | 13.5 | 14.2 | 14.2 | 14.2 | 14.2 |
| b | ≈ | 11.8 | 12.2 | 12.7 | 13.2 | 13.7 | 13.8 | 13.8 |
| d1 | min | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| d2 | 137.7 | 141.6 | 146.6 | 150.2 | 155.2 | 160.2 | 165.2 | |
| per 1000 units ≈ kg | 125 | 140 | 150 | 165 | 170 | 175 | 183 | |
| Nominal Diameterd | 200 | 210 | 220 | 230 | 240 | 250 | 260 | |
| s | max | 4 | 5 | 5 | 5 | 5 | 5 | 5 |
| min | 3.9 | 4.88 | 4.88 | 4.88 | 4.88 | 4.88 | 4.88 | |
| dc | max | 211.2 | 223.7 | 233.7 | 243.7 | 254 | 264 | 277 |
| min | 208.78 | 221.28 | 231.28 | 241.28 | 251.19 | 261.19 | 274.19 | |
| a | max | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 16.2 |
| b | ≈ | 14 | 14 | 14 | 14 | 14 | 14 | 16 |
| d1 | min | 4 | 4 | 4 | 4 | 4 | 4 | 5 |
| d2 | 170.2 | 180.2 | 190.2 | 200.2 | 210.2 | 220.2 | 226 | |
| per 1000 units ≈ kg | 195 | 270 | 315 | 330 | 345 | 360 | 375 | |
| Nominal Diameterd | 270 | 280 | 290 | 300 | ||||
| s | max | 5 | 5 | 5 | 5 | |||
| min | 4.88 | 4.88 | 4.88 | 4.88 | ||||
| dc | max | 287 | 297 | 307 | 317 | |||
| min | 284.19 | 294.19 | 304.19 | 314.19 | ||||
| a | max | 16.2 | 16.2 | 16.2 | 16.2 | |||
| b | ≈ | 16 | 16 | 16 | 16 | |||
| d1 | min | 5 | 5 | 5 | 5 | |||
| d2 | 236 | 246 | 256 | 266 | ||||
| per 1000 units ≈ kg | 388 | 400 | 415 | 435 | ||||
Customizable: Adjust bag quantities, carton sizes/printing, pallet materials upon request.
Key Benefits
√ Low Damage Rate: Multi-layer protection minimizes transit risks.
√ Efficient Handling: Uniform packaging for automated logistics.
With over 20 years of specialization in washer manufacturing, we operate a 1,800+ sqm modern production facility equipped with 30+ fully automated machines (including precision stamping presses and automated production lines), delivering an annual output exceeding 200 million pieces. Our 40+ professional production team guarantees rapid prototyping and mass order fulfillment. Products are widely used in hardware, machinery, construction and other industries. We serve hundreds of domestic clients while maintaining stable supply to global markets. Ample stock available, supporting customized materials/sizes.
| 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 |
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