Holo-krome 08100 Shoulder Screw 5/8 in Alloy Steel Hex Socket

Product Description

The HOLO-KROME 08100 is an alloy steel shoulder screw designed for precision fastening applications requiring a smooth, ground shoulder as a bearing or pivot surface. The screw features a 5/8 inch shoulder diameter and a 1-1/4 inch shoulder length, with a 1/2-13 UNC thread at 3/4 inch thread length. The rounded head measures 7/8 inch in diameter and 3/8 inch in height, accepting a 5/16 inch hex socket drive. Overall length is 2-3/8 inches. The uncoated alloy steel construction meets Grade 8 strength requirements. Licensed machinists, maintenance mechanics, and industrial assembly technicians install this fastener in jigs, fixtures, dies, and mechanical linkages.

This shoulder screw is suited for industrial and commercial applications where a hardened, close-tolerance shaft is needed within an assembly. Common uses include die sets, cam followers, pivot points, and guided-slide mechanisms. The smooth shoulder provides a reliable bearing surface for bushings, rollers, or mating bores. It is appropriate for both light and heavy-duty mechanical assemblies in manufacturing, tooling, and equipment maintenance environments where accurate alignment and repeatable positioning are required.

Key Features

• 5/8 inch shoulder diameter with 1-1/4 inch shoulder length for precise bearing and pivot applications
• Grade 8 alloy steel construction for high tensile and shear strength
• 1/2-13 UNC thread at 3/4 inch thread length for secure clamping
• 5/16 inch hex socket drive for controlled installation torque
• Uncoated finish suitable for use with supplemental lubrication or coatings as required
• Meets ASME B18.3 and ASME B1.1 dimensional and thread standards

Compatibility

Designed as a standard ASME B18.3 shoulder screw for use in dies, fixtures, jigs, and mechanical assemblies requiring a 5/8 inch shoulder diameter and 1/2-13 UNC threaded shank.

Installation Notes

Installation is performed by qualified machinists or maintenance mechanics using a 5/16 inch hex key or socket driver. De-energize and lock out any equipment before replacing or installing fasteners in live assemblies. Verify mating bore and bushing dimensions match the 5/8 inch shoulder diameter before installation to ensure proper fit and function. Do not use impact tools on hex socket fasteners in close-tolerance applications, as this may damage threads or distort the shoulder.