Value Collection 721202PR Flat Socket Cap Screw 3/8-16 X 4 in

Product Description

The VALUE COLLECTION 721202PR is a flat socket cap screw designed for countersunk fastening applications where a flush or recessed head profile is required. Sized at 3/8-16 x 4 inches overall length, it features an 82-degree flat head driven by a 7/32-inch hex socket. Constructed from alloy steel with a black oxide finish, the fastener provides moderate corrosion resistance and reduces light glare on exposed surfaces. It is partially threaded along the shank, which helps maintain clamping load and resist shear forces in structural and mechanical assemblies. Machinists, millwrights, and maintenance technicians commonly install this type of fastener in machine frames, fixtures, and equipment housings.

This screw is suited for general industrial, manufacturing, and mechanical maintenance applications where a countersunk alloy steel fastener is specified. The 3/8-16 UNC thread pattern is a widely used coarse-thread standard, making it compatible with a broad range of tapped holes and threaded inserts in steel, aluminum, and cast iron components. Partial threading along the shank makes it appropriate for clearance-hole assemblies and situations where a smooth shank bearing surface is needed.

Key Features

• 82-degree flat head seats flush in standard countersunk holes per ASME/ANSI B18.3 and ASTM F835
• 7/32-inch hex socket drive for use with standard hex keys or socket drivers
• 3/8-16 UNC coarse thread for broad compatibility with tapped holes in steel, aluminum, and cast iron
• Partially threaded shank provides a smooth bearing surface and shear resistance
• Alloy steel construction offers high tensile and shear strength for demanding mechanical assemblies
• Black oxide finish reduces surface reflectivity and provides light rust inhibition

Compatibility

Designed as an OEM-style and aftermarket replacement flat socket cap screw for applications requiring a 3/8-16 UNC, 4-inch overall length countersunk fastener conforming to ASME/ANSI B18.3 and ASTM F835 standards.

Installation Notes

Installation requires a 7/32-inch hex key or socket driver; ensure the driver is fully seated in the socket before applying torque to avoid cam-out or socket damage. Countersink the mating hole to 82 degrees to achieve proper head seating and flush surface finish. De-energize, lock out, and tag out any machinery before servicing fasteners in live equipment per applicable OSHA lockout/tagout procedures. Inspect threads in the receiving material for damage or contamination before assembly.