304 Stainless Steel & Spring Steel B‑Type / R‑Type Cotter Pins
DISLAB Precision offers professional-grade B‑Type and R‑Type cotter pins — also known as split pins or retaining clips. Engineered from premium 304 stainless steel or high‑elasticity spring steel, these fasteners secure clevis pins, bolts, and axles against loosening under vibration and heavy loads. Our R‑Type wave design delivers superior spring tension and holding power, while the B‑Type closed profile provides enhanced safety and tamper resistance. Precision‑manufactured for durability, elasticity, and reliable performance across automotive, agricultural, and industrial equipment.
Available in diameters from M1 to M10 and lengths from 17mm to 200mm with multiple finish options: zinc‑plated, color‑plated, and double‑coil spring steel variants. Whether for OEM production or maintenance repairs, DISLAB Precision ensures a tight fit and easy installation.
Core Advantages
🔩 High-Grade Material
Choose 304 stainless steel for superior corrosion resistance or spring steel for excellent elasticity & holding power — long-term performance in demanding environments.
⚙️ B‑Type & R‑Type Designs
Closed‑loop B‑type offers enhanced safety & tamper resistance; wave‑shaped R‑type provides strong spring tension and tool‑free installation.
🔄 Elastic & Anti‑Loosening
Precision‑engineered spring properties allow pins to expand and grip hole sides, preventing accidental disengagement even under intense vibration.
📏 Wide Size Compatibility
Nominal diameters M1 → M10 & lengths from 17mm up to 200mm — covering nearly every common fastener assembly need.
Complete Range of Varieties & Sizes
Our assortment covers all common industry standards: B‑Type closed split pins, R‑Type spring cotter pins, wave pins, and locking clips. Manufactured from double‑coil spring steel, zinc‑plated or color‑plated finishes, they are optimized for diverse assembly requirements. From miniature M1 pins for delicate instruments to M10 heavy‑duty fasteners, each batch ensures dimensional accuracy and consistent spring-back performance.
Whether you need bulk standard fasteners or custom non‑standard lengths, DISLAB Precision offers rapid prototyping and mass production capacity. The wave design R‑type provides extra retaining force, ideal for high‑vibration equipment such as harvesters, suspension linkages, and conveyor systems.
Key Specifications
| Feature | Details |
|---|---|
| Material Options | 304 Stainless Steel, Spring Steel (zinc‑plated, color‑plated), Double Coil Spring Steel |
| Types | B‑Type Closed Split Pins, R‑Type Spring Cotter Pins, Wave Pins, Locking Clips |
| Nominal Diameter Range | M1, M1.2, M1.5, M1.6, M1.8, M2, M2.5, M3, M3.5, M4, M5, M6, M7, M8, M10 |
| Nominal Length Range (mm) | 17, 21, 25, 28, 30, 32, 33, 35, 37, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 100, 110, 115, 120, 130, 150, 155, 180, 200mm |
| Finish Options | Polished, Zinc‑Plated, Color‑Plated |
| Applications | Automotive, agricultural machinery, marine equipment, industrial assemblies, home improvement |
| Packaging | Bulk packs, custom packaging available |
| Lead Time | 5‑15 days for standard sizes |
| Sample Service | Freely supplied |
| OEM/ODM | Custom sizes, finishes, and designs available on request |
Common Applications
- 🚗 Automotive & Motorcycle: Suspension systems, brake linkages, axle assemblies
- 🚜 Agricultural Machinery: Tractors, harvesters, farm equipment
- ⛵ Marine Equipment: Corrosion-resistant fasteners for boats, trailers, dock hardware
- 🏭 Industrial Equipment: Conveyor systems, manufacturing machinery
- 🛠️ Home Improvement & DIY: Furniture hardware, tool repairs
📦 Real Customer Case – Bulk Order to Germany
A German agricultural equipment manufacturer producing farm machinery parts needed 50,000 pieces of M3 & M4 cotter pins in various lengths to secure clevis pins in tractor and harvester assemblies. They required strong elasticity and corrosion resistance for harsh agricultural environments. Our team confirmed material grade (304 stainless steel & spring steel), size specs, and finish requirements. Each batch passed full quality checks for spring performance, dimensional accuracy, and corrosion resistance. After bulk packing and shipping to Germany, the customer confirmed perfect fit, reliable anti‑loosening, and durability. This successful project reflects our capacity to meet both standard and bulk custom fastener requirements, with fast delivery for repeat orders.
🏭 At DISLAB Precision, we are your trusted global supplier of industrial parts and accessories — including fasteners, spacers, standoffs, and custom hardware solutions. Backed by a network of 300+ qualified partner facilities, we deliver over 50 million pieces monthly, supporting both small sample orders and large‑volume bulk projects. Every product undergoes strict quality checks for material grade, dimensional accuracy, and surface finish before delivery.
🔗 Explore More Engineered Fasteners
Direct Contact Channels
- One-stop service: design, customization, production, and global delivery
- OEM/ODM solutions for industrial and export-oriented buyers
