1/2 x 3 3/4 Tension Pin (Slotted Spring Pin) is a roll pin for assemblies where self-retention and simple drilled-hole preparation matter. The slotted construction is the reason this same fastener is commonly indexed as a spring pin or roll pin. A normal drilled hole at production tolerance is typically the economic advantage over precision reamed dowel-pin holes.

For machine handles, knob shafts, or operator controls, 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.

Since 1962, Cold Headers has helped industrial buyers locate specialty pin and socket-product configurations. 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: 3 3/4 in. +/-0.030 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.