5/16 x 1 1/8 Tension Pin (Slotted Spring Pin) is a headless spring pin for production or repair work that does not require precision dowel location. The slotted construction is the reason this same fastener is commonly indexed as a spring pin or roll pin. The retaining action comes from spring force and friction at the hole wall, not from threads, adhesive, or staking.

For shaft-to-hub retention, light drives, or spacer assemblies, check the drilled-hole range, pin length, and access for driving the pin squarely. For worn precision holes, 0.001 Oversize Dowel Pins may be the better repair path than using a spring pin.

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: 5/16 in.
• Length: 1 1/8 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.