Value Collection 211028PR Flat Socket Cap Screw 5-40

Product Description

The VALUE COLLECTION 211028PR is a flat socket cap screw designed for precision fastening applications where a flush or countersunk finish is required. Sized at 5-40 UNC x 3/4 inches overall length, this screw features an 82-degree flat head with a 5/64-inch hex socket drive. Constructed from alloy steel with a black oxide finish, it delivers solid mechanical strength while providing moderate corrosion resistance in controlled environments. The screw is fully threaded along its entire length, making it well suited for through-hole and blind-hole assemblies where maximum thread engagement is needed. Licensed machinists, millwrights, and mechanical assembly technicians are the primary installers.

This flat socket cap screw is used in light-duty mechanical assemblies, machine components, fixtures, and equipment where a low-profile flush-mount fastener is specified. The 5-40 thread size targets small-format hardware, instrument panels, and precision equipment enclosures. The black oxide finish blends into dark surfaces and reduces light glare in optical or instrumentation assemblies. Sold individually per package with a minimum order quantity of 100 pieces, it is suited for shop stock and production-line replenishment.

Key Features

• 82-degree flat head seats flush in standard countersunk holes
• 5/64-inch hex socket drive for precise torque application with standard allen keys
• Fully threaded 3/4-inch length maximizes thread engagement in thin and standard stock
• Alloy steel construction provides high tensile strength relative to fastener size
• Black oxide finish reduces surface reflectivity and offers mild rust inhibition
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard 5-40 UNC fully threaded flat socket cap screw conforming to ASME/ANSI B18.3 and ASTM F835, suitable for use in any tapped or through-hole application specifying that thread size and head style.

Installation Notes

Installation requires a 5/64-inch hex key or socket bit driver. Ensure the mating countersink is machined to an 82-degree included angle to achieve proper head seating and flush finish. Thread the fastener by hand before applying torque to avoid cross-threading in precision-tapped holes. De-energize or de-pressurize any assembly before removing or replacing fasteners in live mechanical systems.