Value Collection 711285PR Shoulder Screw 1/2x8 3/8-16 Alloy Steel

Product Description

The VALUE COLLECTION 711285PR is a 4140 alloy steel shoulder screw designed for precision fastening applications that require an accurately ground shank to serve as a bearing surface, pivot, or alignment pin. The shoulder measures 0.5 inches in diameter and 8 inches in length, providing substantial load-bearing surface area. The 3/8-16 UNC threaded end draws the screw tight against the mating component, while the 3/4-inch hex socket head allows installation and removal with a 1/4-inch hex key. The uncoated 4140 alloy steel construction offers high tensile strength and toughness suitable for demanding mechanical assemblies. This fastener is typically installed by machinists, millwrights, and maintenance technicians.

Shoulder screws of this type are used in a wide range of industrial and mechanical applications, including linkages, cams, jigs, fixtures, and guide assemblies where a precise-diameter shank must rotate or slide within a bushing or bore. The 8-inch shoulder length makes this part well-suited to applications requiring extended bearing engagement or where components must be spaced across a significant depth. It is appropriate for both light-production and toolroom environments where ANSI B18.3 and ASME/ANSI B18.3 dimensional compliance is required.

Key Features

• 0.5-inch shoulder diameter with 8-inch shoulder length for extended bearing and pivot applications
• 4140 alloy steel construction for high tensile strength and impact resistance
• 3/8-16 UNC threaded end for secure clamping engagement
• 1/4-inch hex socket drive for standard Allen key installation in confined spaces
• Uncoated finish — no coating buildup to affect shoulder diameter tolerances
• Meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards

Compatibility

Designed as an OEM-style and aftermarket shoulder screw for mechanical assemblies, jigs, fixtures, and linkage systems requiring a 0.5-inch diameter shoulder and 3/8-16 UNC thread engagement.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a 1/4-inch hex key. Ensure the mating bore or bushing inner diameter is matched to the 0.5-inch shoulder diameter with the appropriate fit tolerance before installation. De-energize and lock out all mechanical and electrical energy sources on the host equipment before removing or installing fasteners in live assemblies. Do not exceed the rated torque range for 3/8-16 UNC threads in the base material being used.