Value Collection 581583PS Hex Socket Cap Screw 1/2-20 Unf

Product Description

The VALUE COLLECTION 581583PS is a hex socket cap screw designed for high-strength fastening in mechanical and structural assemblies. It features a 1/2-20 UNF thread size, a 1-5/8 inch length under head, and full threading along the shank. The 3/8 inch hex drive socket head accepts a standard hex key or Allen driver. Constructed from alloy steel with a black oxide finish, this fastener offers solid corrosion resistance and is well-suited for applications where a clean, low-profile head is required. It meets ASME/ANSI B18.3 and ASTM A574 standards.

This socket cap screw is commonly used in industrial machinery, tooling fixtures, equipment frames, and maintenance applications where precise torque and a recessed drive are preferred. The fine UNF thread pitch provides greater thread engagement and is appropriate for applications requiring tight tolerance fits or vibration resistance. Typical installers include millwrights, machinists, maintenance mechanics, and general industrial assembly technicians.

Key Features

• 1/2-20 UNF fine thread for tight tolerance and vibration-resistant fastening
• Fully threaded shank for maximum thread engagement
• 3/8 inch hex drive socket head for standard Allen key or hex bit installation
• Alloy steel construction for high tensile strength
• Black oxide finish for corrosion resistance and reduced light reflection
• Meets ASME/ANSI B18.3 and ASTM A574 standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw suitable for general industrial and mechanical fastening applications requiring a 1/2-20 UNF thread.

Installation Notes

Install using 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-locking compound as required by the assembly specification. Follow applicable torque guidelines per ASME B18.3 or the equipment manufacturer's service documentation.