Value Collection 721150PR Flat Socket Cap Screw 1/4-20 X 3 in

Product Description

The VALUE COLLECTION 721150PR is a flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. The 82-degree flat head seats flush with the mating surface when installed in a properly countersunk hole. Drive is a 5/32-inch hex socket, compatible with standard Allen keys and hex bit drivers. The fastener is partially threaded, which aids in clamping force across unthreaded shank sections. Constructed from alloy steel with a black oxide finish, this screw offers good mechanical strength and modest corrosion resistance in dry or low-moisture environments. Typical installers include mechanical assemblers, millwrights, and maintenance technicians working with steel or aluminum fixtures.

This screw is suited for machine assembly, jigs, fixtures, tooling plates, and general industrial fastening where a low-profile head is required. The 1/4-20 UNC thread is one of the most common inch-series thread forms in North American manufacturing and maintenance applications. The 3-inch overall length accommodates stacking of moderate-thickness materials. The black oxide finish blends visually with dark or painted steel assemblies and provides a degree of surface protection against handling-related corrosion.

Key Features

• 82-degree flat head seats flush when installed in a standard countersunk hole
• 5/32-inch hex socket drive for use with Allen keys or hex bit drivers
• Partially threaded shank for improved clamping across thicker material stacks
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM F835 fastener standards
• Black oxide finish reduces surface glare and provides light corrosion resistance
• 1/4-20 UNC thread — widely available and compatible with standard inch-series tapped holes

Compatibility

Designed for use in any application requiring a 1/4-20 UNC inch-series countersunk socket cap screw with an 82-degree flat head profile and 3-inch overall length, conforming to ASME/ANSI B18.3 and ASTM F835 standards.

Installation Notes

Install using a 5/32-inch hex key or hex socket bit driver. The receiving hole must be countersunk to 82 degrees for the head to seat flush. Verify the tapped hole thread form is 1/4-20 UNC before installation. Power down or de-energize any associated equipment before fastener service, and follow applicable mechanical assembly standards for proper seating and torque practice.