Holo-krome 0800330 Hex Socket Shoulder Screw 3/8in

Product Description

The HOLO-KROME 0800330 is a hex socket shoulder screw machined from 4140 alloy steel in an uncoated finish. The shoulder measures 3/8 inches in diameter and 1/4 inches in length, providing a precise bearing surface for pivot points, linkages, and spacer applications. A 5/16-18 UNRC threaded end with a 1/2-inch thread length secures the fastener in the mating component. The rounded head stands 1/4 inches tall with a 9/16-inch diameter and accepts a 3/16-inch hex socket drive. Overall installed length is 1 inch. This screw is installed by machinists, maintenance technicians, and mechanical assemblers working in industrial, OEM, and MRO applications.

This shoulder screw is suited for applications requiring a hardened, close-tolerance shaft segment as part of the fastener. Common uses include jigs and fixtures, die sets, hinge pivots, roller and bushing mounts, and precision mechanical assemblies where the shoulder acts as a locating or bearing surface. The uncoated finish keeps tolerances tight and is appropriate for dry or lightly lubricated environments. The 4140 alloy steel construction supports high shear and tensile loads relative to the screw size.

Key Features

• 3/8-inch shoulder diameter provides a precise bearing and locating surface
• 4140 alloy steel construction for high shear strength and durability
• 3/16-inch hex socket drive for installation with standard Allen keys or socket drivers
• 5/16-18 UNRC thread ensures compatibility with standard unified coarse tapped holes
• Uncoated finish maintains close dimensional tolerances
• Meets ASME B18.3 and ASME B1.1 dimensional and thread standards

Compatibility

Designed as a standard ASME B18.3 hex socket shoulder screw for use in any application requiring a 3/8-inch shoulder diameter, 5/16-18 UNRC threaded engagement, and a 3/16-inch hex socket drive.

Installation Notes

Install with a 3/16-inch hex key or socket driver; do not use an oversized driver as it will damage the socket. De-energize and lock out any machinery before servicing assemblies that include shoulder screws. Thread engagement into the mating tapped hole should meet standard depth recommendations per ASME B18.3 to develop full thread strength. Inspect the shoulder and mating bore for burrs or contamination before installation to maintain dimensional accuracy.