Value Collection 581534PS Hex Socket Cap Screw 7/16-20 Unf

Product Description

The VALUE COLLECTION 581534PS is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, tooling fixtures, and industrial equipment. It features a 7/16-20 UNF thread size with a 6-inch length under the head and is partially threaded, making it suited for applications where the shank must pass through a clearance hole before engaging a threaded bore. The screw is driven with a 3/8-inch hex key. Constructed from alloy steel with a black oxide finish, it delivers solid tensile strength and moderate corrosion resistance in controlled environments. Machinists, maintenance technicians, and industrial assemblers typically install this fastener.

This screw is appropriate for use in precision machinery, hydraulic and pneumatic equipment mounting, jigs, dies, and structural mechanical joints where fine-thread engagement is required. The 7/16-20 UNF pitch provides tighter thread spacing than coarse-thread equivalents, offering improved resistance to loosening under vibration. The black oxide finish reduces light reflection and provides a degree of surface protection in dry or lightly oiled environments. It meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for applications specifying those fastener grades.

Key Features

• 7/16-20 UNF fine thread for high vibration resistance and precise torque control
• 6-inch length under head with partial threading to span clearance holes
• 3/8-inch hex socket drive for use with standard Allen keys or hex bit drivers
• Alloy steel construction meets ASTM A574 high-strength socket screw requirements
• Black oxide finish provides mild corrosion resistance and low-glare appearance
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw for use in any application requiring a 7/16-20 UNF partially threaded fastener with a 3/8-inch hex drive. Compatible with standard 7/16-20 UNF threaded holes in metal assemblies.

Installation Notes

Installation is performed by machinists or maintenance technicians using a 3/8-inch hex key or socket bit. Ensure the mating threaded hole is clean and free of debris before driving. Do not exceed the rated torque for the alloy steel grade and thread size per applicable engineering references. Power down and de-energize any associated equipment before performing fastener service on live assemblies.