Value Collection 581530PR Hex Socket Cap Screw 7/16-20 Unf

Product Description

The VALUE COLLECTION 581530PR is a partially threaded 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 and measures 3.5 inches under the head. The alloy steel construction with a black oxide finish provides corrosion resistance and surface hardness suited to demanding service environments. The 3/8-inch hex drive accepts standard Allen keys and hex bit drivers. This fastener meets ASME/ANSI B18.3 and ASTM A574 standards, making it appropriate for structural and load-bearing connections where torque retention and dimensional consistency are required.

This cap screw is used across a wide range of trade and industrial applications including machine assembly, hydraulic component mounting, conveyor and frame fabrication, and equipment repair work. The fine 20-thread-per-inch UNF pitch provides stronger thread engagement and better torque control compared to coarse-thread fasteners of the same diameter, making it a common choice where vibration resistance or precise clamping force is needed. Machinists, millwrights, maintenance technicians, and mechanical contractors typically specify this style of fastener.

Key Features

• 7/16-20 UNF fine-thread profile for improved torque control and vibration resistance
• 3.5-inch length under head suits deeper through-bolt and tapped-hole applications
• Partially threaded shank provides a stronger grip zone and shear resistance
• Alloy steel construction meets ASTM A574 high-strength socket screw requirements
• Black oxide finish reduces surface corrosion and galling during installation
• 3/8-inch hex socket drive compatible with standard Allen keys and hex bit drivers

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw for use in any tapped or clearance-hole application requiring a 7/16-20 UNF thread and 3.5-inch grip length.

Installation Notes

Installation is performed with a 3/8-inch hex key or hex bit driver. Ensure mating threads are clean and free of debris before installation. Apply thread lubricant or thread locker as required by the assembly specification. Always follow applicable mechanical and structural codes for torque and preload requirements in your specific application.