Value Collection R63008363 Flat Socket Cap Screw 4-40

Product Description

The VALUE COLLECTION R63008363 is a flat socket cap screw designed for fastening applications that require a flush or countersunk finish. The 82-degree flat head seats fully into a countersunk hole, eliminating protrusion above the mating surface. Sized at 4-40 UNC threading with an overall length of 3/8 inches, this screw is driven with a 1/16-inch hex socket key. Constructed from 18-8 stainless steel, it provides solid corrosion resistance in moderate-exposure environments. Mechanical and maintenance technicians use this fastener in precision assemblies, panel work, and equipment enclosures where a flush surface profile is required.

This screw is suited for light-duty fastening in electrical enclosures, instrumentation panels, HVAC control panels, and general mechanical assemblies. The 4-40 UNC thread is a common size in small component fastening across residential and commercial equipment maintenance. The 18-8 stainless steel construction makes it appropriate for indoor environments and applications with mild moisture exposure where standard carbon steel fasteners would corrode prematurely.

Key Features

• 82-degree flat head seats flush in countersunk holes for a clean, low-profile finish
• 18-8 stainless steel construction provides corrosion resistance in moderate environments
• 4-40 UNC thread is a widely used size in small-component and panel fastening
• 1/16-inch hex socket drive for precise torque application in tight spaces
• Overall length of 3/8 inches suits thin-panel and light-gauge fastening applications

Compatibility

Designed as a standard inch-series flat socket cap screw compatible with 4-40 UNC threaded holes in countersunk applications across mechanical, electrical, and HVAC equipment assemblies.

Installation Notes

Installation requires a 1/16-inch hex key or hex socket bit driver. The mating hole must be countersunk to 82 degrees for proper head seating. Ensure threads are clean and free of debris before driving. Do not overtighten — 18-8 stainless fasteners are susceptible to galling if driven under excessive force or speed.