Value Collection 221202BR Shoulder Screw 5/8 in Grade 8 Alloy Steel

Product Description

The VALUE COLLECTION 221202BR is a Grade 8 alloy steel shoulder screw designed for precision fastening applications where a smooth, accurately dimensioned bearing surface is required. The shoulder measures 0.625 inches in diameter and 4-3/4 inches in length, providing a close-tolerance pivot or spacer surface between mating components. Drive engagement is via a 5/16 inch hex socket. The threaded portion uses a 1/2-13 UNC thread form. The screw is supplied with an uncoated finish and meets ANSI B18.3 and ASTM A574 standards. Machinists, millwrights, tool and die makers, and maintenance technicians install this type of fastener in fixtures, dies, jigs, and mechanical assemblies.

Shoulder screws of this configuration are commonly used in industrial machinery, tooling fixtures, punch and die sets, and linkage assemblies where a hardened, ground shoulder serves as a pivot pin, guide pin, or stripper bolt. The 4-3/4 inch shoulder length accommodates applications requiring a longer bearing surface or clearance through thicker stock. The Grade 8 alloy steel construction provides the tensile strength necessary for high-load and repeated-cycle service environments typical in manufacturing and fabrication settings.

Key Features

• 0.625 inch shoulder diameter with 4-3/4 inch shoulder length for extended bearing surface
• Grade 8 alloy steel construction for high tensile strength and durability
• 1/2-13 UNC threaded end for secure clamping into tapped holes
• 5/16 inch hex socket drive for installation with standard Allen or hex key tools
• Uncoated finish — suitable for applications where coating thickness tolerances are critical
• Meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards

Compatibility

Designed as a standard shoulder screw for use in industrial fixtures, tooling dies, mechanical linkages, and precision assemblies requiring a 5/8 inch diameter shoulder and 1/2-13 UNC threaded engagement.

Installation Notes

Installation is performed by machinists or maintenance technicians using a 5/16 inch hex key or Allen driver. The receiving tapped hole should be clean and dimensioned to the 1/2-13 UNC thread specification before installation. Do not apply excessive torque that could shear the threaded section or damage the shoulder surface finish. Inspect the shoulder for nicks or burrs before installing in close-tolerance bores, as surface damage can affect pivot or guide performance.