Value Collection 721218PR Flat Socket Cap Screw 3/8-24

Product Description

The VALUE COLLECTION 721218PR is a flat socket cap screw designed for precision fastening applications requiring a flush or countersunk head profile. It features a 7/32-inch hex socket drive and an 82-degree flat head angle, making it compatible with standard countersunk hole geometries. The screw is partially threaded with a 3/8-24 UNF thread and measures 2.5 inches in overall length. Constructed from alloy steel with a black oxide finish, it provides solid mechanical strength and moderate corrosion resistance in controlled environments. Licensed trades and industrial assembly professionals install this fastener where low-profile, high-torque socket drive performance is required.

This fastener suits applications in mechanical assemblies, machine construction, tooling fixtures, and equipment where a flush-mount screw is needed to avoid protrusion above the surface. The 3/8-24 UNF thread pitch is a fine-thread specification commonly used in applications demanding stronger thread engagement or precision adjustment. The black oxide finish reduces light reflection and offers mild surface protection in dry or lightly oiled environments. It is appropriate for residential and industrial equipment maintenance as well as original equipment manufacturing contexts.

Key Features

• 82-degree flat head for standard countersunk seating
• 7/32-inch hex socket drive for reliable torque transfer
• 3/8-24 UNF fine-thread specification for precise thread engagement
• Partially threaded shank for applications requiring an unthreaded grip length
• Alloy steel construction for high tensile strength
• Black oxide finish for reduced reflectivity and mild surface protection

Compatibility

Designed as a standard ASME/ANSI B18.3 and ASTM F835 compliant flat socket cap screw in the 3/8-24 UNF thread class, suitable for use in countersunk hole applications across mechanical assemblies and equipment requiring an inch-system fine-thread fastener.

Installation Notes

Install using a 7/32-inch hex key or socket drive tool. Ensure the mating countersunk hole is machined to an 82-degree included angle for proper head seating. Follow applicable torque guidelines for 3/8-inch alloy steel fasteners per the equipment manufacturer or applicable ASME standards. Inspect threads and hole condition before installation to avoid cross-threading or improper seating.