Value Collection 211019PR Flat Socket Cap Screw 4-40 1/2 in

Product Description

The VALUE COLLECTION 211019PR is a flat socket cap screw designed for precision fastening applications where a flush or countersunk head profile is required. It features an 82-degree flat head geometry and a 1/16-inch hex socket drive. The screw is fully threaded in a 4-40 UNC thread configuration and measures 1/2 inch in overall length. Constructed from alloy steel with a black oxide finish, it provides solid mechanical strength and moderate corrosion resistance in controlled environments. This fastener is commonly installed by machinists, maintenance technicians, and assembly professionals working with light-duty threaded hardware.

This flat socket cap screw is suited for applications where the fastener head must sit flush with or below the surface of the mating material. Typical use cases include instrument assemblies, electronic enclosures, jig and fixture construction, and precision mechanical assemblies. The 4-40 thread size and 1/2-inch length make it a common choice for small-frame components and light structural connections in both production and field-repair settings. Orders must be placed in multiples of 100 units, and each package contains 1 piece.

Key Features

• 82-degree flat head for flush or countersunk installation
• 1/16-inch hex socket drive for precise torque application
• Fully threaded 4-40 UNC configuration along the entire 1/2-inch length
• Alloy steel construction for dependable mechanical strength
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard-dimension replacement or production fastener for any application requiring a 4-40 UNC fully threaded flat socket cap screw with an 82-degree head angle, conforming to ASME/ANSI B18.3 and ASTM F835 specifications.

Installation Notes

Installation should be performed by a qualified machinist or technician using a 1/16-inch hex key or compatible socket driver. Ensure the receiving material is properly tapped to 4-40 UNC specifications before driving the fastener. Do not exceed the rated drive torque for the 4-40 thread class, and inspect the countersink angle of the mating part to confirm it matches the 82-degree head geometry before final assembly.