Value Collection 721036PR Flat Socket Cap Screw 4-40 X 1 in

Product Description

The VALUE COLLECTION 721036PR is a flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. Built to ASME/ANSI B18.3 and ASTM F835 standards, this screw features an 82-degree flat head driven by a 1/16-inch hex socket. The body is machined from alloy steel and finished with black oxide for moderate corrosion resistance. At a 4-40 UNC thread size and 1-inch overall length with full threading, it is suited for precision mechanical assemblies, electronics enclosures, and light structural work where a low-profile head is required. Licensed tradespeople and machinists typically install this fastener in light-duty industrial and mechanical settings.

This screw is used in assemblies that require a countersunk seating surface so the fastener head sits flush with or below the material surface. Common applications include instrument panels, small machine components, electronic enclosures, and jig-and-fixture work. The 4-40 UNC thread standard is widely used in precision instruments and small-scale mechanical assemblies. The black oxide finish provides mild rust inhibition and reduces light reflection, making it appropriate for both functional and low-visibility installations.

Key Features

• 82-degree flat head seats flush in standard countersunk holes
• 1/16-inch hex socket drive for use with standard Allen wrenches or hex keys
• Fully threaded along the entire 1-inch overall length
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM F835 standards
• Black oxide finish provides mild corrosion resistance and low-reflectivity appearance
• 4-40 UNC thread standard for compatibility with common tapped holes in precision assemblies

Compatibility

Designed as an OEM-style replacement or standard-specification fastener for any assembly requiring a 4-40 UNC fully threaded flat socket cap screw with an 82-degree head angle and 1-inch overall length.

Installation Notes

Install with a 1/16-inch hex key or Allen wrench. Ensure the receiving hole is properly countersunk to 82 degrees before seating the fastener. Power down any electrical or mechanical equipment before fastener installation or removal in live assemblies. Do not overtighten; follow the torque specifications provided by the assembly manufacturer for 4-40 thread class fasteners.