Value Collection 36879 Flat Socket Cap Screw 1/2-20 X 1 in

Product Description

The VALUE COLLECTION 36879 is a flat socket cap screw engineered for applications requiring a flush or countersunk fastener profile. Built from alloy steel with a black oxide finish, this screw features an 82-degree flat head and a 5/16-inch hex socket drive. The 1/2-20 unified fine thread (UNF) runs fully along the 1-inch overall length, providing maximum thread engagement in blind or through holes. This fastener meets ASME/ANSI B18.3 and ASTM F835 standards, making it a reliable choice for mechanical assemblies, jigs, fixtures, and precision equipment installations handled by maintenance technicians and millwrights.

This screw is suited for industrial, mechanical, and light structural applications where the fastener head must sit flush with or below the mating surface. The black oxide finish provides mild corrosion resistance and reduces surface glare, making it appropriate for tooling, machine guarding, and equipment panels. Sold in a package quantity of 10, it is practical for service kits, small production runs, and field repair stock.

Key Features

• 82-degree flat head seats flush in standard countersunk holes for a low-profile assembly
• 5/16-inch hex socket drive accepts standard Allen wrenches and hex bit drivers
• 1/2-20 UNF thread provides fine-pitch engagement for improved holding strength in vibration-prone assemblies
• Fully threaded along the entire 1-inch length for maximum fastening flexibility
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM F835 fastener standards
• Black oxide finish reduces surface reflection and offers mild corrosion resistance

Compatibility

Designed as an OEM-style replacement or service fastener for any assembly requiring a 1/2-20 UNF fully threaded flat socket cap screw with an 82-degree head angle and 5/16-inch hex socket drive.

Installation Notes

Installation is typically performed by maintenance technicians, millwrights, or mechanical contractors using a calibrated hex key or 5/16-inch Allen bit driver. Always verify that the countersink angle of the mating part matches the 82-degree head angle before seating the fastener. De-energize and lock out any equipment before replacing fasteners in powered assemblies. Apply thread lubricant or thread-locking compound only as specified by the equipment manufacturer.