5/16 x 3 1/4 Tension Pin (Slotted Spring Pin) supports economical retention in hinges, pivots, and light mechanical joints. Use the three names together when cross-checking older maintenance notes, bills of material, or shop requests. A normal drilled hole at production tolerance is typically the economic advantage over precision reamed dowel-pin holes.

For cabinet mechanisms, access panels, or hinged service hardware, check the drilled-hole range, pin length, and access for driving the pin squarely. Where stainless material and precision location are both required, 18-8 Stainless Steel Standard Dowel Pins may fit the drawing better.

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: 3 1/4 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.