Value Collection SF043037 Precision Dowel Pin 5/16x1/2 Grade 8

Product Description

The VALUE COLLECTION SF043037 is a precision dowel pin designed for accurate component alignment and fixturing in machined assemblies. Manufactured from Grade 8 alloy steel, it delivers a Rockwell hardness of 50-58 HRC, providing high resistance to wear and shear forces. The pin measures 5/16 inch in diameter and 1/2 inch in overall length, with a diameter tolerance of 0.0002 inches for tight, repeatable fits. One end is beveled for guided insertion, and the opposite end is rounded. A rated breaking strength of 20,000 pounds in double shear confirms the load capacity expected from a Grade 8 fastener. Machinists, toolmakers, and precision fabricators install this pin in jigs, fixtures, dies, and mating bores.

This pin is suited for industrial and manufacturing applications where precise hole-to-hole alignment is critical. Typical installations include machine tool fixtures, die sets, assembly jigs, and other tooling where repeatable positional accuracy must be maintained under load. The compact 1/2 inch length makes it well suited for shallow through-bores and blind-hole applications in metal fabrication and production machining environments. It conforms to ASME B18.8.2, the standard governing ground machine dowel pins used across general metalworking trades.

Key Features

• Grade 8 alloy steel construction with 50-58 HRC hardness for wear and shear resistance
• Diameter tolerance of 0.0002 inches for precision interference or transition fits
• Breaking strength of 20,000 pounds measured in double shear
• One beveled end and one rounded end for controlled insertion and positive seating
• Conforms to ASME B18.8.2 standard for ground precision dowel pins
• Compact 5/16 inch diameter by 1/2 inch length for shallow-bore fixture applications

Compatibility

Designed as a standard ASME B18.8.2 precision ground dowel pin for use in machined holes requiring a 5/16 inch diameter pin with 0.0002 inch diameter tolerance, suitable for jigs, fixtures, dies, and general metalworking assemblies.

Installation Notes

Precision dowel pins are typically installed by machinists or toolmakers using an arbor press or soft-faced mallet to avoid surface damage. Always verify bore diameter and finish before installation to confirm the correct fit class. Pins should not be driven into undersized or unfinished holes, as this can damage the pin geometry and reduce alignment accuracy. Inspect mating bores for burrs, chips, or contamination before pressing the pin into position.