Holo-krome 720003677 Hex Socket Cap Screw 1-8 Unc

Product Description

The HOLO-KROME 720003677 is a hex socket cap screw designed for high-strength fastening in industrial and mechanical applications. It features a 1-8 UNC thread size with a 1.5-inch length under head and is fully threaded from the bearing face to the tip. The 3/4-inch hex drive socket accepts a standard hex key or Allen driver. Constructed from alloy steel with a black oxide coating, this screw provides strong resistance to corrosion and meets ASME B18.3 and ASTM A574 dimensional and mechanical standards. It is well suited for use in machinery, fixtures, and structural assemblies requiring a compact, recessed-head fastener.

This cap screw is used in applications where a flush or recessed fastener head is required and tensile strength is critical. Typical install scenarios include machine frames, tooling fixtures, brackets, and industrial equipment assemblies. The fully threaded body allows full engagement across a range of material thicknesses. Alloy steel construction with black oxide finish is common in manufacturing and maintenance environments where parts are subject to mechanical stress and moderate corrosion exposure.

Key Features

• 1-8 UNC thread form for standard coarse-thread engagement
• 1.5-inch length under head, fully threaded for maximum engagement
• 3/4-inch hex socket drive accepts standard hex key or Allen driver
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide coating provides corrosion resistance and reduces light reflection
• Conforms to ASME B18.3 dimensional standards

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw suitable for use in any application requiring a 1-8 UNC coarse-thread alloy steel fastener with a 3/4-inch hex drive and 1.5-inch length under head.

Installation Notes

Installation is performed with a 3/4-inch hex key or Allen driver; use a calibrated torque wrench to achieve proper clamp load per the applicable fastener specification. Ensure the mating threaded hole is clean and free of debris before installation. Power down and de-energize any equipment before accessing fastener locations in electrical or mechanical enclosures. Follow applicable ASME or facility torque standards for 1-inch diameter alloy steel fasteners.