Value Collection 225163BR Shoulder Screw 5/8 in 4140 Alloy Steel

Product Description

The VALUE COLLECTION 225163BR is a hex socket shoulder screw machined from 4140 alloy steel, designed for precision-fit pivot and alignment applications in mechanical assemblies. The shoulder measures 0.625 inches in diameter and 1.5 inches in length, providing a controlled bearing surface that thread engagement alone cannot deliver. The 1/2-13 UNC threaded section locks the fastener into the mating component while the shoulder carries radial load and guides movement. Licensed mechanics, tool-and-die technicians, and maintenance pros reach for this fastener when a slip-fit shaft or pivot point is required.

Shoulder screws of this type appear in jigs and fixtures, linkage assemblies, cam and follower mechanisms, and precision machine components where a clean rotating or sliding interface is needed. The 4140 alloy steel construction gives this screw the strength and wear resistance demanded in production tooling, automation equipment, and industrial machinery environments. The hex socket drive allows installation in recessed or confined locations where a conventional hex bolt head would not clear surrounding geometry.

Key Features

• Shoulder diameter: 0.625 inches for controlled slip-fit bearing surfaces
• Shoulder length: 1.5 inches to span typical boss and spacer depths
• 1/2-13 UNC thread for broad compatibility with standard tapped holes
• 4140 alloy steel for high tensile strength and hardness in demanding applications
• 5/16 inch hex socket drive for torque application in tight clearances
• Meets ASME/ANSI B18.3, ASTM F835, and IFI 124 standards

Compatibility

Designed as a standard shoulder screw for use in jigs, fixtures, and mechanical assemblies requiring a 0.625 inch shoulder diameter and 1/2-13 UNC thread engagement.

Installation Notes

Installation is typically performed by machinists or maintenance technicians using a 5/16 inch hex key or Allen driver. De-energize and lock out any machine before servicing fasteners in moving assemblies per applicable OSHA lockout/tagout procedures. Ensure the mating bore is dimensioned for a slip fit to the 0.625 inch shoulder before driving the screw to seat. Do not substitute thread lubricant or adhesive unless the design specifically calls for it, as both affect the clamping and slip characteristics of the joint.