Value Collection 581690BR Hex Socket Cap Screw 5/8-18 Unf

Product Description

The VALUE COLLECTION 581690BR is a hex socket cap screw designed for demanding fastening applications where a recessed-drive, high-strength fastener is required. Manufactured from alloy steel with a black oxide coating, this screw resists corrosion and reduces light reflection in service environments. The 5/8-18 UNF thread pattern provides a fine-pitch engagement suited to applications requiring precise torque control and strong thread retention. At 7 inches of length under head and partially threaded, it is well-suited to through-bolt configurations or deep structural assemblies. Drive is via a 1/2-inch hex socket. It meets ASME/ANSI B18.3 and ASTM A574 standards, confirming high-strength alloy fastener classification.

This cap screw is used across a wide range of mechanical, industrial, and structural assembly applications. Typical installations include machine frames, equipment mounting, die and fixture work, and similar heavy-duty fastening tasks where a flush or low-profile head is required. The fine UNF thread suits applications with vibration or where precise clamp load adjustment is needed. Machinists, millwrights, maintenance mechanics, and general industrial assembly personnel are the primary installers of this fastener type.

Key Features

• 5/8-18 UNF fine-pitch thread for precise torque control and vibration resistance
• 7 inches length under head with partial threading for through-bolt and structural assemblies
• Alloy steel construction meets ASTM A574 high-strength fastener requirements
• Black oxide coating provides corrosion resistance and reduced surface reflectivity
• 1/2-inch hex socket drive compatible with standard hex keys and socket drive tools
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard-dimension hex socket cap screw per ASME/ANSI B18.3, suitable for any application requiring a 5/8-18 UNF partially threaded socket head cap screw with a 7-inch length under head.

Installation Notes

Installation is performed using a 1/2-inch hex key or socket drive tool rated for the required torque. Ensure mating threads and the bearing surface are clean and free of debris before assembly. Follow applicable torque specifications from the equipment manufacturer or relevant industry standards for ASTM A574 alloy steel fasteners. Do not exceed the rated strength of the fastener by applying impact or over-torque conditions.