A slotted spring pin is a cylindrical fastener with an axial slot, also known as a roll pin or C-pin, that flexes and compresses when inserted into a hole, creating continuous pressure to hold components together. This flexibility allows for a wider tolerance range in the hole size, reducing manufacturing costs, and provides self-retaining properties through friction rather than deformation. Made from materials like stainless steel, it is used in various industries to secure and connect parts, absorb shock, and allow for easy disassembly.
The DIN1481 Slotted Spring Pin (also known as a “roll pin” or “C-pin”) is a cylindrical elastic fastener designed for joining, retaining, and aligning components in industrial, automotive, and electronic assemblies. Compliant with DIN1481 and ISO8752 standards, this pin features a precision axial slot that enables compression and flexing—creating continuous friction-based retention when inserted into pre-drilled holes, eliminating the need for extra fasteners (e.g., nuts, cotter pins).
Crafted from materials like stainless steel (304/316) and high-carbon steel, the DIN1481 Slotted Spring Pin excels in applications requiring lightweight, reusable, and cost-effective fastening. It is widely used in hinge assemblies (furniture/automotive), shaft-hub connections (machinery), locating pins (electronics), and stop pins (conveyor systems)—where it absorbs shock, accommodates minor hole tolerances, and simplifies disassembly for maintenance.
Model NO. | DIN1481 / ISO8752 |
Product Name | Spring Pin/Slotted Spring Pin |
Size | Standard |
Package | Carton+Pallet |
Delivery Time | 15-30days |
Industry | Fastener |
Brand | Donghuang |
Measurement | Metric, Imperial (Inch) |
Supply Ability | 1000 Tons Per Month |
Sample | Available |
Certificate | ISO 9001 2015/ISO 14001 2015 |
Color | Black/Sliver |
Transport Package | Inner Box + Outer Carton + Wooden Pallet |
Specification | DIN, ISO, ANSI, BS, UNI, JIS |
Origin | China |
HS Code | 7318290000 |
Production Capacity | 5 Millions |
The DIN1481 Slotted Spring Pin has a sleek, functional design tailored to its elastic performance and ease of installation:
Cylindrical Body: A smooth, uniform cylindrical shape (standard diameters: 2mm–20mm) with no burrs or sharp edges—preventing damage to mating components during insertion.
Axial Slot: A narrow, evenly cut axial slot (running the full length of the pin) that enables compression; when inserted into a hole, the slot closes slightly, creating outward pressure against the hole wall.
Chamfered Ends: Both ends feature a 45° chamfered finish that guides the pin into holes smoothly, reducing installation force and avoiding hole deformation.
Surface Options: Available in silver stainless steel (for corrosion resistance) or black oxide coating (for aesthetic appeal and extra wear protection), with consistent color and finish across batches.
Unlike traditional pins that require reamed holes (tight tolerances), the DIN1481 Slotted Spring Pin works with standard straight-drilled holes—cutting manufacturing costs by 30% (no extra reaming steps). Its chamfered ends enable manual or automated insertion in seconds, making it ideal for high-volume production lines (e.g., automotive assembly).
The pin’s axial slot creates continuous outward pressure against hole walls, ensuring a secure fit without nuts or cotter pins. It accommodates hole tolerance variations of ±0.1mm—critical for assemblies where hole drilling precision is hard to maintain (e.g., cast metal parts).
Made from stainless steel (304/316), the pin resists corrosion in damp or chemical environments (e.g., food processing equipment). It retains its spring property even after 100+ insertion-removal cycles, reducing replacement costs compared to one-time-use pins.
Available in metric (DIN1481) and imperial (ANSI) sizes, the pin works with global equipment models. It can be customized for length (5mm–100mm) and material (e.g., high-carbon steel for higher strength) to meet specific application needs.
Our DIN1481 Slotted Spring Pins undergo rigorous quality control to ensure compliance with international standards and customer expectations:
Material Validation: Stainless steel grades are tested for corrosion resistance (salt spray test: 48 hours for 304, 72 hours for 316) and tensile strength (minimum 500 MPa).
Dimensional Accuracy: Each pin is checked for diameter, length, slot width, and chamfer angle using precision calipers (tolerance: ±0.02mm for diameters ≤10mm).
Elasticity Testing: Pins are inserted into standard holes and tested for retention force (minimum 50N) and spring recovery (must return to original shape after compression).
Finish Inspection: Silver pins are checked for surface smoothness (no scratches), while black oxide pins undergo adhesion tests (tape test: no peeling).
Certifications: We hold ISO 9001:2015 and ISO 14001:2015 certifications, with each batch accompanied by a COC (Certificate of Conformity) and test report.
Unlike solid pins (which require precise hole tolerances and extra fasteners), DIN1481 pins use an axial slot for compression—they fit standard holes, self-retain via friction, and are reusable. This makes them faster to install and more cost-effective for most assemblies.
Yes. We offer food-grade 316 stainless steel pins (compliant with FDA standards) that resist corrosion from food acids and cleaning chemicals. These pins are widely used in food processing machinery (e.g., conveyor hinges).
Standard sizes (e.g., 5mm×10mm, 8mm×20mm) are in stock—lead time is 3–5 days. Custom sizes (non-standard diameters/lengths) take 10–15 days, depending on quantity.
