Value Collection 581496PR Hex Socket Cap Screw 3/8-24 Unf

Product Description

The VALUE COLLECTION 581496PR is a hex socket cap screw designed for high-strength fastening applications in mechanical, industrial, and trade assembly work. It features a 3/8-24 UNF thread size with a 3-1/2 inch length under head and uses a 5/16 inch hex drive. The screw is partially threaded, which helps maintain clamping force across mating surfaces without thread engagement along the full shank. Constructed from alloy steel with a black oxide finish, it resists corrosion and maintains dimensional integrity under torque loads. This fastener meets ASME/ANSI B18.3 and ASTM A574 standards, making it appropriate for structural and precision fastening tasks where rated strength and fit tolerance are required.

This screw is commonly used in machine assembly, equipment maintenance, jig and fixture fabrication, and general mechanical work requiring a fine-thread UNF fastener. The fine 3/8-24 thread pitch provides higher thread engagement per inch compared to coarse thread, making it well suited for thin materials, vibration-prone assemblies, and applications where precise torque control matters. It is typically installed by maintenance technicians, millwrights, and mechanical tradespeople working on machinery, structural brackets, and equipment panels.

Key Features

• 3/8-24 UNF fine thread for high thread engagement and vibration resistance
• 3-1/2 inch length under head suits medium to deep fastening applications
• Partially threaded shank maintains clamping load across joined surfaces
• 5/16 inch internal hex drive for standard Allen wrench or hex bit socket
• Alloy steel construction with black oxide finish for corrosion resistance
• Meets ASME/ANSI B18.3 and ASTM A574 standards for socket cap screws

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw suitable for use in any application requiring a 3/8-24 UNF partially threaded cap screw with a 5/16 inch hex drive and 3-1/2 inch length under head.

Installation Notes

Install using a calibrated torque wrench with a 5/16 inch hex bit or Allen key. Power down and de-energize any equipment before accessing fastener locations on machinery or electrical enclosures. Follow ASME torque guidelines for alloy steel socket cap screws at the applicable thread size and grade. Do not reuse fasteners that show signs of thread damage, galling, or deformation.