Value Collection 211131PR Flat Socket Cap Screw 1/4-28

Product Description

The VALUE COLLECTION 211131PR is a flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. It features an 82-degree flat head with a 5/32-inch hex socket drive and is fully threaded along its 1-1/4-inch overall length. The 1/4-28 UNF thread specification suits fine-thread applications where vibration resistance or precise thread engagement is a priority. Manufactured from alloy steel with a black oxide finish, this screw delivers solid mechanical strength and modest corrosion resistance. It is installed by machinists, millwrights, maintenance technicians, and general tradespeople working with metal fabrication, equipment assembly, or machine maintenance.

This fastener is suited for use in machinery, fixtures, brackets, and assemblies where a low-profile head is required to sit flush with or below the workpiece surface. The fine 1/4-28 UNF thread makes it appropriate for tapped holes in metal components where standard 1/4-20 UNC thread engagement is insufficient. Typical install environments include manufacturing floors, maintenance shops, and field service applications. This screw meets ASME/ANSI B18.3 and ASTM F835 fastener standards.

Key Features

• 82-degree flat head profile for flush or countersunk installations
• 5/32-inch hex socket drive for use with standard Allen or hex key tooling
• Fully threaded 1/4-28 UNF fine thread along the full 1-1/4-inch length
• Alloy steel construction for high tensile and shear strength
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• Meets ASME/ANSI B18.3 and ASTM F835 standards

Compatibility

Designed as a standard 1/4-28 UNF flat socket cap screw compatible with any tapped or through-hole application conforming to ASME/ANSI B18.3 dimensional requirements for this thread size and head type.

Installation Notes

Install using a 5/32-inch hex key or Allen driver. Countersink the mating hole to 82 degrees to achieve full flush seating of the flat head. Confirm the tapped hole thread specification is 1/4-28 UNF before installation to avoid cross-threading or improper engagement. Follow applicable torque guidelines for 1/4-28 alloy steel fasteners as specified by the equipment manufacturer or relevant industry standards.