Value Collection 721425BR Flat Socket Cap Screw 3/4-16 X 4 in

Product Description

The VALUE COLLECTION 721425BR is a flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. The 82-degree flat head seats fully into a countersunk hole, leaving a smooth surface when installed. Drive engagement is through a 1/2-inch hex socket, which allows high torque transfer in confined spaces where a wrench cannot reach. The screw is partially threaded with a 3/4-16 UNF thread form — a fine-pitch thread well suited to precise clamping and vibration-resistant assemblies. Manufactured from alloy steel with a black oxide finish, this fastener provides solid mechanical strength and moderate corrosion resistance in indoor or lightly protected environments.

This fastener is used across general industrial, mechanical, and manufacturing applications where a low-profile or flush-mount fastener is required. Typical installations include machine guards, fixtures, jigs, tooling plates, and structural assemblies where surface protrusion must be minimized. The fine UNF thread is commonly found in applications involving thinner sections or where tighter thread engagement is needed. Licensed machinists, millwrights, and maintenance technicians are the primary installers. Sold individually.

Key Features

• 82-degree flat head seats flush into standard countersunk holes
• 1/2-inch hex socket drive for high-torque installation with a hex key or bit
• 3/4-16 UNF fine-pitch thread for precise clamping and vibration resistance
• Partially threaded shank provides a bearing surface and shear strength in clearance holes
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM F835 standards
• Black oxide finish reduces surface reflectivity and provides light corrosion protection

Compatibility

Designed as an OEM-style replacement or direct-use fastener for any assembly requiring a 3/4-16 UNF flat socket cap screw with an 82-degree head angle, conforming to ASME/ANSI B18.3 and ASTM F835.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a calibrated hex key or hex bit driver. Ensure the mating countersunk hole is machined to the correct 82-degree angle and diameter before installation. De-energize and lock out any machinery before fastener replacement or assembly work. Do not exceed the torque capacity of the drive recess — use proper-fit tooling to avoid socket rounding.