Value Collection 221217BR Shoulder Screw 3/4 in Alloy Steel

Product Description

The VALUE COLLECTION 221217BR is a hex socket shoulder screw machined from Grade 8 alloy steel. It features a 0.75-inch shoulder diameter and a 1.75-inch shoulder length, making it suitable for use as a precision pivot, spacer, or guide pin in mechanical assemblies. The threaded portion uses a 5/8-11 UNC thread standard. The head measures 1 inch in diameter and 0.5 inches in height. This fastener is left uncoated and meets ANSI B18.3 and ASTM A574 standards. It is installed with a 3/8-inch hex socket drive. Machinists, maintenance technicians, and industrial assemblers work with this type of shoulder screw in fixture and tooling applications.

Shoulder screws of this size are commonly used in jigs, fixtures, dies, and mechanical linkages where a precise cylindrical bearing surface is required. The ground shoulder acts as a bearing journal or a positive stop, allowing mating components to rotate or slide along the shoulder without thread engagement. This particular screw suits medium-to-heavy-duty applications where Grade 8 alloy steel strength and tight dimensional tolerances are needed. It is sold individually with a minimum order quantity of one.

Key Features

• 0.75-inch shoulder diameter with 1.75-inch shoulder length for precise fit in bored holes
• Grade 8 alloy steel construction meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards
• 5/8-11 UNC threaded shank for secure clamping in standard tapped holes
• 3/8-inch hex socket drive allows torque application in confined spaces
• Uncoated finish — suitable for further treatment or use where coating is not required
• 1-inch head diameter and 0.5-inch head height provide a solid seating surface

Compatibility

Designed as a standard ANSI B18.3 hex socket shoulder screw for use in mechanical assemblies, jigs, dies, and fixtures that require a 3/4-inch shoulder diameter and a 5/8-11 UNC threaded engagement.

Installation Notes

Installation is performed with a 3/8-inch hex key or socket drive. Ensure the mating bored hole is sized to the shoulder diameter tolerance specified by ANSI B18.3 for proper fit. De-energize or lock out any machinery before fastener installation or replacement. Do not use an impact driver, as this may damage the hex socket recess or over-torque the threaded section.