Value Collection 581257PR Hex Socket Cap Screw 8-32 Unc

Product Description

The VALUE COLLECTION 581257PR is a hex socket cap screw designed for precision fastening in mechanical assemblies, machinery, and structural applications. It carries an 8-32 UNC thread size with a 2-inch length under head and is partially threaded for proper clamping load distribution. The 9/64-inch hex drive accepts a standard allen key or hex bit driver. Made from alloy steel with a black oxide finish, this screw offers solid mechanical strength and moderate corrosion resistance for indoor and controlled-environment installations. It meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for applications that require verified fastener performance.

This screw is suited for use in manufacturing, equipment assembly, machine building, and general industrial maintenance. Partially threaded cap screws like this one are commonly used when the unthreaded shank needs to pass through a clearance hole before engaging a tapped bore. The black oxide coating reduces galling and provides a clean finished appearance. Typical installers include machinists, millwrights, maintenance technicians, and general mechanical assemblers working in shop or field environments.

Key Features

• 8-32 UNC thread for use with standard tapped holes in that size range
• 2-inch length under head provides adequate grip length for deeper assemblies
• Partial threading allows shank to pass through clearance holes cleanly
• 9/64-inch hex drive accepts standard allen keys and hex bit drivers
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish reduces surface friction and provides a uniform appearance

Compatibility

Designed as an OEM-style replacement or standard-stock hex socket cap screw for mechanical assemblies requiring an 8-32 UNC partially threaded fastener with a 2-inch length under head.

Installation Notes

Installation requires a 9/64-inch hex key or matching hex bit driver. Ensure the mating tapped hole meets 8-32 UNC thread specifications before driving the fastener. Do not over-torque alloy steel screws in softer base materials such as aluminum. Follow applicable ASME B18.3 torque guidelines for fastener size and material class when torque values are required by the application.