Value Collection 40851 Shoulder Screw 3/4 in Alloy Steel

Product Description

The VALUE COLLECTION 40851 is a hex socket shoulder screw machined from Grade 8 alloy steel with an uncoated finish. The shoulder measures 0.75 inches in diameter and 5 inches in length, providing a precision bearing surface for rotating or sliding components. The 5/8-11 UNC threaded section anchors the fastener into tapped holes. The head is 1 inch in diameter and 0.5 inches tall, driven by a 3/8 inch hex socket. This screw is installed by machinists, maintenance technicians, and assembly professionals working on precision mechanical assemblies.

Shoulder screws of this type are used in jigs, fixtures, dies, linkages, and rotating pivot assemblies across manufacturing and industrial maintenance settings. The precision ground shoulder acts as a shaft, pin, or guide for bushings, bearings, and spacers. This size is common in heavy-duty fixture builds and large-format tooling where a rigid, accurate pivot point is required. Sold in a package quantity of 5.

Key Features

• 0.75 inch shoulder diameter provides a precision bearing or pivot surface
• 5 inch shoulder length accommodates deep stack assemblies or extended pivot spans
• Grade 8 alloy steel construction for high tensile and shear strength
• 5/8-11 UNC thread for secure engagement in standard tapped holes
• 3/8 inch hex socket drive for installation with standard Allen wrenches or hex bit drivers
• Meets ANSI B18.3 and ASTM A574 standards for dimensional and mechanical compliance

Compatibility

Designed as an OEM-style replacement or direct-install shoulder screw for precision mechanical assemblies requiring a 0.75 inch shoulder diameter and 5/8-11 UNC thread engagement.

Installation Notes

Shoulder screws should be installed by qualified machinists or mechanical technicians familiar with precision fastener assemblies. De-energize and lock out any machinery before servicing. Use a calibrated 3/8 inch hex key or bit driver and tighten to the assembly specification provided in the equipment documentation. Do not use impact drivers on shoulder screws, as overtorque can damage the precision shoulder surface or the tapped bore.