Value Collection 221001PR Shoulder Screw 1/4 in Alloy Steel

Product Description

The VALUE COLLECTION 221001PR is an alloy steel shoulder screw with a 1/4-inch shoulder diameter and a 3/8-inch shoulder length. The hex socket drive accepts a 1/8-inch hex key for installation and removal. The screw features a 10-24 UNC thread and an uncoated finish, leaving the alloy steel grade 8 construction exposed for applications where additional coating is not required. This fastener is installed by millwrights, maintenance technicians, and mechanical assemblers working on precision machinery, jigs, fixtures, and mechanical linkages where a hardened, tight-tolerance shaft is needed within the assembly.

Shoulder screws of this type serve as pivot points, guide pins, and spacers in mechanical assemblies. The 3/8-inch shoulder acts as a precision shaft that locates or pivots moving components, while the 10-24 threaded section anchors the fastener to the base material. Common applications include tooling fixtures, die sets, linkage mechanisms, and light industrial equipment where repeatable positioning and controlled movement are required.

Key Features

• 1/4-inch shoulder diameter with 3/8-inch shoulder length for precise shaft location
• Grade 8 alloy steel construction for high tensile strength and wear resistance
• 10-24 UNC thread standard for broad compatibility with tapped assemblies
• 1/8-inch hex socket drive for installation with a standard hex key
• Uncoated finish suitable for dry or lightly lubricated environments
• Meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards

Compatibility

Designed as a standard shoulder screw for use in mechanical assemblies, tooling fixtures, and linkage systems requiring a 1/4-inch shoulder diameter and 10-24 UNC threaded connection.

Installation Notes

Installation is performed with a 1/8-inch hex key; de-energize and lock out any equipment before servicing mechanical assemblies containing this fastener. Ensure the receiving bore is sized appropriately for the 1/4-inch shoulder to achieve proper fit and function. Do not use an impact driver on hex socket shoulder screws, as this can damage the drive recess or distort the shoulder.