5/16 x 1 1/4 Tension Pin (Slotted Spring Pin) is a spring steel roll pin for economical retention in a drilled hole. In search and purchasing records, this part may be called a tension pin, slotted spring pin, or roll pin. Compared with a dowel-pin fit, the tension pin is usually chosen when economical retention matters more than tenths-level location.

In latch mechanisms, lock hardware, and service doors, the headless form keeps the joint compact after installation. For worn precision holes, 0.001 Oversize Dowel Pins may be the better repair path than using a spring pin.

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: 1 1/4 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.