Value Collection 33604 Hex Socket Cap Screw 1/4-20 Unc

Product Description

The VALUE COLLECTION 33604 is a hex socket cap screw designed for secure fastening in mechanical assemblies, tooling fixtures, machine components, and structural applications. It features a 1/4-20 UNC thread size and a 1-inch length under head, with full threading along the shank for maximum thread engagement. The drive is a 3/16-inch hex socket, accepting a standard Allen key or hex bit driver. Manufactured from alloy steel with a black oxide finish, this fastener offers solid tensile strength and moderate corrosion resistance in protected indoor environments. It meets ASME/ANSI B18.3 and ASTM A574 standards.

This screw is suited for general industrial and mechanical installation work where a flush or low-profile fastener is required. Its fully threaded design makes it appropriate for through-hole and tapped-hole applications in steel, aluminum, and similar substrates. Typical users include machinists, maintenance technicians, millwrights, and mechanical contractors working on equipment assembly or repair. The black oxide finish provides a clean, non-reflective appearance and minimal dimensional change over the base material.

Key Features

• 1/4-20 UNC thread size for compatibility with standard tapped holes and nuts
• 1-inch length under head, fully threaded for maximum engagement
• 3/16-inch hex socket drive accepts standard Allen keys and hex bits
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish for reduced glare and basic surface protection
• Conforms to ASME/ANSI B18.3 dimensional standard

Compatibility

Designed as a standard 1/4-20 UNC hex socket cap screw for use in any tapped hole or threaded application conforming to ASME/ANSI B18.3 specifications.

Installation Notes

Installation is performed using a 3/16-inch hex key or Allen bit driver; ensure the drive is fully seated before applying torque to avoid cam-out and socket damage. Verify the receiving thread is clean and properly tapped to the UNC standard before installation. De-energize and lock out any equipment before fastener service on live machinery, following applicable OSHA lockout/tagout procedures. Do not use this fastener in wet or outdoor environments where corrosion resistance beyond black oxide is required without additional protection.