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, frequently referred to as a roll pin or C-pin, serves as a fundamental cylindrical elastic fastener engineered for securing, retaining, and precisely aligning components across demanding industrial environments. Manufactured in strict compliance with DIN1481 and ISO8752 engineering standards, this specialized pin features a meticulously machined axial slot. This longitudinal gap allows the metal cylinder to compress radially during insertion. Once seated within a pre-drilled hole, the pin naturally attempts to expand to its original resting diameter, generating a continuous, high-friction radial force against the host material's walls. This self-locking mechanism entirely eliminates the reliance on secondary fastening hardware, such as threaded nuts, locking washers, or cotter pins, thereby streamlining assembly architecture.
Engineered from premium-grade materials, including 304/316 stainless steel and high-carbon steel alloys, the DIN1481 Slotted Spring Pin delivers exceptional performance in scenarios demanding lightweight, highly reusable, and economically efficient retention solutions. Its exceptional structural integrity makes it a preferred choice for heavy-duty shaft-hub connections in industrial machinery, pivot hinge assemblies in automotive manufacturing, precise locating pins in electronic infrastructure, and reliable stop pins within automated conveyor systems. Furthermore, its proven reliability extends to specialized sectors, providing critical fastening solutions for offshore wind turbines, hyperscale data center structural racks, and heavy earth-moving equipment. By actively absorbing operational shocks, dampening severe vibrations, and accommodating minor hole drilling tolerances, this versatile fastener significantly simplifies both initial manufacturing phases and long-term maintenance disassembly.
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 physical profile of the DIN1481 Slotted Spring Pin is the result of precise metallurgical engineering, designed to maximize elastic recovery and facilitate rapid deployment on assembly lines. When handled, the pins offer a distinct metallic density and a smooth, cold tactile feel, indicative of their flawless machining.
Transitioning to the DIN1481 Slotted Spring Pin inherently streamlines manufacturing workflows. Unlike traditional solid dowel pins that demand precisely reamed holes with exceptionally tight tolerances, these elastic pins are designed to function flawlessly within standard, straight-drilled cavities. By eliminating the secondary reaming process entirely, production facilities can immediately reduce hole-preparation costs by up to 30%. The intelligently chamfered ends allow for rapid alignment, enabling both manual operators and automated pneumatic presses to complete insertions in mere fractions of a second. This rapid deployment makes the fastener an indispensable component for high-volume automotive, appliance, and consumer electronics assembly lines.
The fundamental brilliance of this fastener lies in its continuous radial tension. As the axial slot compresses, the pin's inherent spring characteristics generate a constant, outward-pushing force against the interior walls of the hole. This friction-based retention secures the assembly against heavy vibrations without requiring supplementary locking mechanisms. Crucially, the elastic nature of the pin effortlessly accommodates hole diameter variations of ±0.1mm. This flexible tolerance is particularly vital when working with cast metal parts, injection-molded plastics, or extruded profiles where maintaining absolute drilling precision is structurally challenging or economically unfeasible.
Manufactured from premium materials like 304 and 316 stainless steel, these spring pins offer exceptional structural longevity. They inherently resist oxidative degradation, rust, and chemical corrosion, making them suitable for damp environments, food processing equipment, and outdoor structural frameworks. The high-yield strength of the metal ensures that the pin retains its critical spring properties and radial memory even after undergoing more than 100 insertion and extraction cycles. This remarkable reusability drastically lowers long-term maintenance expenses and replacement costs when compared to single-use cotter pins or easily deformed retaining rings.
Engineered to bridge global manufacturing standards, these slotted pins are available in both metric (DIN1481) and imperial (ANSI) measurement systems, ensuring flawless integration into diverse equipment models worldwide. Beyond standard carbon steel and austenitic stainless variants, we offer deep customization capabilities. We can produce these fasteners in highly specialized alloys, such as 1.4462 duplex stainless steel, to meet stringent engineering specifications requiring exceptional tensile strength and pitting corrosion resistance. Furthermore, non-standard lengths (ranging from 5mm to over 100mm) and specific material hardness profiles can be custom-manufactured to perfectly align with your proprietary application requirements.
Delivering consistent, failure-free performance requires uncompromising quality control protocols. Our manufacturing facilities subject every batch of DIN1481 Slotted Spring Pins to an exhaustive suite of advanced laboratory testing, ensuring reliable lifecycle predictability under extreme operational stresses.
Solid dowel pins demand absolute precision—requiring expensive hole reaming and often relying on interference fits or secondary locking hardware to stay in place. In contrast, DIN1481 slotted pins utilize a hollow, rolled design with a longitudinal gap. This allows them to compress radially, fitting securely into standard drilled holes while self-retaining through constant outward spring tension. They are highly resistant to vibration loosening, reusable, and significantly faster to install, making them a far more cost-effective fastening solution for modern assembly operations.
Absolutely. We manufacture highly specialized food-grade pins utilizing premium 316 stainless steel, which fully complies with stringent FDA material handling standards. This specific alloy offers superior resistance to pitting and corrosion caused by acidic food byproducts, saline solutions, and harsh, high-temperature chemical washdown procedures. These resilient fasteners are extensively deployed in commercial food processing machinery, automated packaging lines, and sanitary conveyor hinge mechanisms.
For standard, high-demand dimensions (such as 5mm×10mm or 8mm×20mm), we maintain a massive ready-to-ship inventory, allowing us to process and dispatch orders within a rapid 3 to 5-day window. For non-standard diameters, custom lengths, or specialized surface coatings, our agile manufacturing process typically requires 10 to 15 days, depending on the complexity and volume of the specific production run.
As a direct source factory, we are uniquely positioned to support massive industrial demands and streamline your supply chain. We offer aggressive, tiered volume discounts for large-scale procurement, substantially lowering your comprehensive acquisition costs. Supported by thousands of tons of on-hand inventory and partnerships with premier global logistics networks, we ensure rapid, uninterrupted delivery schedules anywhere in the world, safeguarding your production lines against costly downtime.
