Value Collection 711178BR Shoulder Screw 1in 3-1/4in 3/4-10 Alloy

Product Description

The VALUE COLLECTION 711178BR is a hex socket shoulder screw machined from 4140 alloy steel, designed for precision fastening applications where a smooth cylindrical shoulder is required between mating parts. The shoulder measures 1 inch in diameter and 3.25 inches in length, providing a stable bearing surface or pivot point. The threaded portion is 3/4-10 UNC, and the fastener is driven with a 1/2 inch hex socket key. The uncoated finish is consistent with ANSI B18.3 and ASTM A574 standards. Licensed machinists, millwrights, and maintenance technicians working on jigs, fixtures, linkages, or precision assemblies are the primary installers.

This shoulder screw fits industrial and commercial applications where a controlled-clearance shaft or pivot is needed. Common uses include fixture plates, stripper bolts in die and mold tooling, linkage pins in mechanical assemblies, and pivot points in automated equipment. The 4140 alloy steel construction supports high-load and moderate-impact environments. The uncoated surface is suitable for applications where secondary treatment or lubrication will be applied by the installer.

Key Features

• 1 inch shoulder diameter with 3.25 inch shoulder length for precise bearing and pivot applications
• 3/4-10 UNC thread provides coarse-thread engagement with standard tapped holes
• 4140 alloy steel construction for high tensile strength and fatigue resistance
• 1/2 inch hex socket drive allows high-torque installation in confined spaces
• Head diameter of 1.3125 inches and head height of 0.625 inches for positive seating
• Meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards

Compatibility

Designed as a standard ANSI B18.3 hex socket shoulder screw for use in industrial fixtures, tooling plates, and mechanical assemblies requiring a 1 inch diameter shoulder and 3/4-10 UNC threaded engagement.

Installation Notes

Installation is performed by machinists, millwrights, or qualified maintenance technicians using a 1/2 inch hex key or socket driver. Ensure the receiving bore is sized to the shoulder diameter for proper fit and alignment before installation. De-energize, de-pressurize, or lock out any machinery before installing or removing fasteners in live assemblies. Do not use impact drivers at full torque without verifying thread engagement to avoid stripping the UNC threads.