1/2 x 5/16 Tension Pin (Slotted Spring Pin) uses spring action to hold itself in a prepared hole without an added head. In search and purchasing records, this part may be called a tension pin, slotted spring pin, or roll pin. For this diameter, the free OD is 0.513-0.524 in. against a recommended hole of 0.500-0.510 in., so the oversize is intentional.

Common uses include maintenance spare kits, repair benches, and field replacement work, where the pin retains parts without a threaded fastener. For blind holes where removal access matters, Pull Dowel Pins are the related locating-pin option to review.

For repair operations, distributors, and OEM sourcing, Cold Headers can help match the item number, diameter, length, and standard. 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: 1/2 in.
• Length: 5/16 in. +/-0.015 in.
• Pin OD Before Insertion: 0.524 / 0.513 in. (max/min)
• Recommended Hole Size: 0.510 / 0.500 in. (max/min)
• Min Double Shear: 27,100 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.