Value Collection 581674BR Hex Socket Cap Screw 5/8-18 Unf

Product Description

The VALUE COLLECTION 581674BR is a partially threaded hex socket cap screw designed for high-strength fastening applications. It features a 5/8-18 UNF thread size and a 2-3/4-inch length under the head, with a 1/2-inch hex drive socket. Constructed from alloy steel with a black oxide finish, it delivers corrosion resistance and a clean, low-reflectance appearance. This fastener meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for demanding mechanical assemblies where precise thread engagement and material strength are required.

This cap screw is used in a wide range of industrial, mechanical, and structural assembly applications. Typical installations include machine bases, fixtures, tooling plates, and equipment frames where controlled clamping load and a recessed drive are needed. The fine 18-thread-per-inch pitch provides precise torque control and is well suited for applications involving vibration resistance or thin-material engagement. Installers across manufacturing, maintenance, and trade work rely on this type of fastener for reliable, repeatable assembly.

Key Features

• 5/8-18 UNF fine thread for precise torque control and vibration resistance
• 2-3/4-inch length under the head for deeper engagement in thick assemblies
• 1/2-inch hex socket drive for use with standard hex keys and socket drivers
• Partially threaded shank for accurate alignment and shear-load capability
• Alloy steel construction meets ASTM A574 high-strength requirements
• Black oxide finish provides mild corrosion resistance and low-glare appearance

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw for use in any application requiring a 5/8-18 UNF partially threaded fastener with a 1/2-inch hex drive.

Installation Notes

Installation is performed with a 1/2-inch hex key or socket driver; ensure the drive tool is fully seated before applying torque to prevent rounding. Verify the mating threaded hole is clean and properly tapped to 5/8-18 UNF before installation. Apply a thread lubricant or anti-seize compound as appropriate for the service environment to achieve accurate clamp load. Do not exceed the rated mechanical limits of the fastener or mating material.