Value Collection 581499PS Hex Socket Cap Screw 3/8-24 Unf

Product Description

The VALUE COLLECTION 581499PS is a hex socket cap screw designed for secure fastening in precision and structural applications. It features a 3/8-24 UNF thread, a 1-5/8 inch length under head, and a 5/16 inch hex drive. Constructed from alloy steel with a black oxide coating, the fastener delivers high tensile strength and basic corrosion resistance. It is partially threaded, which allows for accurate clamping force across joint faces. This screw meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for demanding mechanical and industrial assembly work. Machinists, millwrights, and maintenance technicians are the typical installers.

This cap screw is suited for tight-clearance fastening applications where a hex key or Allen wrench is required and a hex head is not practical. Common installation scenarios include machine frames, fixtures, tooling plates, industrial equipment housings, and precision assemblies where controlled torque and joint integrity are critical. The partially threaded shank helps maintain proper alignment and load distribution at the joint interface. It is commonly used in both light industrial and heavy equipment maintenance settings.

Key Features

• 3/8-24 UNF thread for fine-pitch engagement and high clamping load
• 1-5/8 inch length under head with partial threading for accurate joint clamping
• 5/16 inch hex socket drive for use with standard Allen keys or hex bit drivers
• Alloy steel construction per ASTM A574 for high tensile strength
• Black oxide finish provides mild corrosion and abrasion resistance
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard-dimension hex socket cap screw conforming to ASME/ANSI B18.3, suitable for any application requiring a 3/8-24 UNF fine-thread fastener with a 5/16 inch hex drive.

Installation Notes

Installation is performed using a 5/16 inch hex key or Allen-style bit driver. Ensure mating threaded holes are clean and free of debris before driving the fastener. Apply thread-locking compound or fastener lubricant as required by the assembly specification. Do not exceed the rated torque specification for the fastener grade to avoid stripping or joint damage.