Value Collection C703413 Hex Head Cap Screw 5/8-18

Product Description

The VALUE COLLECTION C703413 is a Grade 8 steel hex head cap screw in a 5/8-18 UNF thread configuration with a 2.5-inch length under head. Grade 8 is a high-strength designation suited for demanding mechanical and structural fastening applications where tensile strength and resistance to shear stress are critical. The screw is partially threaded and left uncoated, conforming to ASME B18.2.1 dimensional standards. It is installed using a standard hex wrench or socket. Maintenance mechanics, millwrights, and field service technicians routinely spec this fastener size for heavy-duty equipment assembly and repair work.

This cap screw is appropriate for general industrial and mechanical fastening in both shop and field environments. The 5/8-18 UNF thread pitch is a fine-thread specification, which provides greater thread engagement strength and better resistance to loosening under vibration compared to coarse-thread alternatives of the same diameter. The partial threading leaves a shank section below the head, which is common in joint applications where shear loading is a primary design consideration. Sold in a package quantity of 25.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 5/8-18 UNF fine-thread form for increased thread engagement and vibration resistance
• Partially threaded shank provides a bearing surface for shear-loaded joints
• Uncoated finish — no plating or treatment that could affect dimensional tolerances
• Conforms to ASME B18.2.1 dimensional standard for hex head cap screws
• Package quantity of 25 units per order

Compatibility

Designed as a standard-specification hex head cap screw for use in any application requiring a 5/8-18 UNF Grade 8 partially threaded fastener per ASME B18.2.1.

Installation Notes

Installation is performed using a properly sized hex socket or open-end wrench rated for Grade 8 fastener torque requirements. Follow the equipment manufacturer or applicable engineering specification for target torque values, as proper clamp load is critical for joint integrity. Ensure mating threads are clean and free of debris before installation. Do not mix inch and metric fasteners in the same joint assembly.