5/16 x 4 1/2 Heat Treated Steel Standard Dowel Pin is a bread-and-butter die and fixture component for repeatable part registration. Standard Series dowels are intentionally oversize, with the basic diameter 0.0002 in. over nominal so the pin presses into a nominal reamed hole.

In machine frame alignment, mounting plates, and machined bases, the hardened ground pin helps repeat location through service, teardown, and rebuild cycles. For worn or re-reamed holes, 0.001 Oversize Dowel Pins are the repair companion to standard pins used for initial installation.

Cold Headers helps toolrooms, maintenance teams, and industrial distributors locate hard-to-find dowel pin sizes. Review the nominal diameter, measured pin range, recommended hole size, end form, and length before matching this dowel pin to an assembly.

Technical Highlights

• Diameter: 5/16 nominal - measures 0.3126-0.3128 in.
• Length: 4 1/2 in.
• Material: Heat Treated Steel
• Series: Standard (basic +0.0002 in. over nominal)
• Recommended Hole Size: 0.3125-0.3120 in.
• Hardness: Surface Rc 60 min., Core Rc 47-58
• Ends: one chamfered, one crowned
• Calculated Single Shear: 11,500 lbs
• Dimensional Standard: ASME B18.8.2

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.