Value Collection 711206PR Shoulder Screw 1-1/4 in 4140 Alloy Steel

Product Description

The VALUE COLLECTION 711206PR is a heavy-duty shoulder screw machined from 4140 alloy steel with an uncoated finish. It features a 1.25-inch shoulder diameter and a 2.5-inch shoulder length, making it well suited for applications that require a precision bearing or pivot surface. The threaded portion is 7/8-9 UNC. Drive engagement is through a 5/8-inch hex socket. This screw meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards. It is installed by machinists, maintenance technicians, and industrial assemblers working on machinery, jigs, fixtures, and precision mechanical assemblies where a controlled cylindrical shank is required.

This shoulder screw is used in applications where a rotating or sliding component must pivot or ride on a smooth, accurately dimensioned shank rather than on a thread. Common install scenarios include fixture building, die sets, linkage assemblies, and conveyor or automation equipment. The 4140 alloy steel construction provides high tensile strength and wear resistance suitable for moderate to heavy load conditions in both production and maintenance environments.

Key Features

• 1.25-inch shoulder diameter with 2.5-inch shoulder length provides a precise bearing surface
• 4140 alloy steel construction for high tensile strength and wear resistance
• 7/8-9 UNC thread for secure clamping engagement
• 5/8-inch hex socket drive for standard Allen key or hex bit installation
• 1.75-inch head diameter and 0.75-inch head height for positive seating
• Uncoated finish; meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards

Compatibility

Designed as an OEM-style and aftermarket replacement shoulder screw for machinery, fixtures, jigs, and mechanical assemblies requiring a 1.25-inch diameter precision shoulder with 7/8-9 UNC threading and hex socket drive.

Installation Notes

Installation is performed by qualified machinists or maintenance technicians. Before installation, ensure the mating bore is clean, correctly toleranced for the shoulder diameter, and free of burrs. Use a calibrated 5/8-inch hex key or socket bit and tighten to the torque specification required by the assembly design. Do not use the shoulder threads as a load-bearing surface; the shoulder itself is the functional bearing interface.