Value Collection 721129PR Flat Socket Cap Screw 12-24

Product Description

The VALUE COLLECTION 721129PR is a flat socket cap screw designed for flush or countersunk fastening applications requiring a clean, low-profile head. Built from alloy steel with a black oxide finish, this screw delivers solid mechanical strength and moderate corrosion resistance in a compact form factor. The 82-degree flat head seats flush into chamfered holes, and the 1/8-inch hex socket drive accepts standard hex keys or Allen wrenches. At 1/2 inch in overall length with full threading along the entire shank, this fastener is suited to thin-material assemblies and tight clearance joints. Machinists, millwrights, and maintenance technicians commonly install this type of screw in equipment panels, fixtures, and machine frames.

This screw follows the Unified National Coarse (UNC) thread standard at a 12-24 thread size and meets ASME/ANSI B18.3 and ASTM F835 fastener standards. It is appropriate for general industrial and mechanical assembly applications where a countersunk socket drive fastener is required. The black oxide finish is commonly used in shop environments where oil or light protective coating will be applied post-installation. This screw is sold in a package quantity of one, with a minimum order quantity of ten units.

Key Features

• 82-degree flat head profile seats flush in standard countersunk holes
• 1/8-inch hex socket drive for use with standard Allen wrenches or hex bits
• Fully threaded shank along entire 1/2-inch length for maximum thread engagement in thin materials
• Alloy steel construction provides high tensile strength for mechanical fastening
• Black oxide finish reduces light reflection and provides mild corrosion resistance
• Meets ASME/ANSI B18.3 and ASTM F835 standards

Compatibility

Designed as a standard UNC 12-24 flat socket cap screw compatible with any chamfered or countersunk through-hole or tapped hole meeting ASME/ANSI B18.3 dimensional specifications for this thread and head type.

Installation Notes

Installation is typically performed by machinists, maintenance technicians, or millwrights using a 1/8-inch hex key or Allen driver. Ensure the receiving hole is chamfered to 82 degrees for proper head seating before driving the screw. Do not overtighten in soft or thin base materials, as the conical head can split or deform the countersink. Apply a thread-locking compound or appropriate torque practice per the equipment manufacturer's assembly specifications.