5/16 x 1 1/2 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 0.321-0.330 in. against a recommended hole of 0.312-0.318 in., so the oversize is intentional.

This size is often reviewed for electronics assemblies, appliance hardware, and light mechanical frames when a self-retaining driven pin is specified. For worn precision holes, 0.001 Oversize Dowel Pins may be the better repair path than using a spring pin.

Cold Headers can assist when drawings, service records, and replacement needs call for an exact spring pin size. 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: 1 1/2 in. +/-0.020 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.