Value Collection 251253PR Oversized Dowel Pin 3/8x3/4 in

Product Description

The VALUE COLLECTION 251253PR is a military specification oversized dowel pin used to align and locate precision components in mechanical assemblies. Made from alloy steel with a hardness of 50-58 HRC, this pin delivers the strength and wear resistance required in demanding industrial and military-grade applications. It measures 3/8 inch in diameter and 3/4 inch in overall length, with a diameter tolerance of 0.0010 inch for tight, controlled fits. The pin features one beveled end and one rounded end, a standard configuration for guided insertion into close-tolerance bored holes. Licensed machinists, tool and die makers, and maintenance mechanics are the primary installers.

This dowel pin is suited for fixturing, jig building, die-set alignment, and precision machine assembly where repeatable location is required. The oversized designation indicates the pin is manufactured above standard nominal diameter to fit reamed holes that have been opened slightly from nominal. It is compliant with ASME B18.8.2, making it appropriate for both military and commercial aerospace, defense, and heavy industrial applications where fastener standards are specified by engineering drawings.

Key Features

• Military specification design per ASME B18.8.2 for use in controlled, print-specified assemblies
• Alloy steel construction with 50-58 HRC hardness for high shear resistance and durability
• 28,700 pound breaking strength measured in double shear
• Diameter tolerance of 0.0010 inch for precise fit in reamed bores
• One beveled end and one rounded end for controlled, damage-free insertion
• Oversized diameter for use in bores that have been opened above nominal

Compatibility

Designed as an oversized replacement or new-installation dowel pin for precision mechanical assemblies requiring ASME B18.8.2 compliant fasteners with a 3/8 inch nominal diameter and 3/4 inch length in alloy steel.

Installation Notes

Installation of dowel pins requires a properly reamed bore sized to accept the oversized diameter with the correct interference or slip fit per the engineering drawing callout. Use a pin press or arbor press for controlled insertion — do not drive pins with a hammer, as this can damage the bore or deform the pin. De-burr and clean the bore before installation. Verify fit class and tolerance requirements against the applicable drawing before selecting pin diameter.