5/16 x 3 1/2 Tension Pin (Slotted Spring Pin) is built around the slotted spring-pin principle: free diameter larger than the recommended hole. The slotted construction is the reason this same fastener is commonly indexed as a spring pin or roll pin. The slot accommodates the difference between the 0.321-0.330 in. free OD and the smaller 0.312-0.318 in. hole.
In small gear hubs, pulley spacers, and drive accessories, the headless form keeps the joint compact after installation. Where stainless material and precision location are both required, 18-8 Stainless Steel Standard Dowel Pins may fit the drawing better.
Cold Headers brings long-running industrial fastener experience to tension-pin quoting, cross-checking, and size confirmation. Review the verified OD, hole-size, shear, and length-tolerance data before matching this pin to a drawing or service record.
Technical Highlights
- Nominal Diameter: 5/16 in.
- Length: 3 1/2 in. +/-0.030 in.
- Pin OD Before Insertion: 0.330 / 0.321 in. (max/min)
- Recommended Hole Size: 0.318 / 0.312 in. (max/min)
- Min Double Shear: 10,800 lbs
- Material: Spring Steel (cold rolled, hardened and tempered)
- Ends: Chamfered both ends
- Style: Slotted (also called spring pin / roll pin)
- Dimensional Standard: ASME B18.8.2
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
