Value Collection 581602PR Hex Socket Cap Screw 1/2-20 Unf

Product Description

The VALUE COLLECTION 581602PR is a partially threaded hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, fixtures, and structural components. It features a 1/2-20 UNF thread size and measures 8 inches in length under the head. The 3/8-inch hex drive accepts a standard Allen key or hex bit driver. Manufactured from alloy steel with a black oxide finish, this fastener delivers solid corrosion resistance and reduced surface glare in service environments. It conforms to ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for demanding industrial and mechanical applications.

This cap screw is appropriate for use in industrial machinery, fabrication work, tooling fixtures, and structural fastening where a recessed drive and high tensile strength are required. The fine 1/2-20 UNF thread pitch provides precise clamping force and is well-suited for applications requiring vibration resistance or controlled torque. The black oxide alloy steel construction is commonly specified in maintenance, repair, and original equipment manufacturing contexts across a range of industries.

Key Features

• 1/2-20 UNF fine thread for precise clamping and vibration resistance
• 8-inch length under head accommodates deep or thick-stack fastening applications
• 3/8-inch hex socket drive for use with standard Allen keys or hex bit drivers
• Partially threaded shank for accurate alignment and load distribution
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish provides mild corrosion resistance and low-glare appearance

Compatibility

Designed as an OEM-style or aftermarket replacement hex socket cap screw for industrial, mechanical, and fabrication applications requiring a 1/2-20 UNF partially threaded fastener conforming to ASME/ANSI B18.3 and ASTM A574 standards.

Installation Notes

Install using a calibrated torque wrench with a 3/8-inch hex key or bit to achieve proper clamping force without stripping the socket. Degrease mating threads and inspect for damage before installation. Follow applicable torque specifications from the equipment manufacturer or relevant industry standards. Alloy steel fasteners should not be mixed with incompatible materials in corrosive environments without appropriate treatment or isolation.