Holo-krome 78030 Hex Socket Cap Screw 8-32 Unc 5/8 in

Product Description

The HOLO-KROME 78030 is a hex socket cap screw designed for precision fastening applications requiring corrosion-resistant hardware. Threaded 8-32 UNC and fully threaded along its 5/8-inch length under head, this fastener accepts a 9/64-inch hex drive. Constructed from 18-8 stainless steel with a bright, uncoated finish, it meets ASME B18.3 and ASTM F837 standards. It is suited for mechanical assemblies, equipment mounting, and structural fastening tasks where stainless fasteners are specified. Machinists, millwrights, maintenance technicians, and electricians commonly install this type of fastener.

This cap screw is appropriate for light mechanical and electrical enclosure assembly, instrument panels, HVAC equipment brackets, and similar applications where a low-profile socket-drive fastener is required. The 8-32 UNC thread form is a coarse-pitch unified inch thread commonly used in sheet metal, aluminum extrusions, and threaded inserts across residential and commercial equipment. Full threading along the grip length eliminates the need for a separate standoff or spacer in thin-stock assemblies.

Key Features

• 8-32 UNC thread with full threading along the entire 5/8-inch length under head
• 9/64-inch hex socket drive for Allen wrench or hex bit installation
• 18-8 stainless steel construction for corrosion and oxidation resistance
• Bright uncoated finish — no plating to chip, flake, or interfere with thread tolerance
• Meets ASME B18.3 and ASTM F837 dimensional and material standards

Compatibility

Designed as an OEM-style replacement or service fastener for any assembly specifying an 8-32 UNC hex socket cap screw with a 5/8-inch length under head in stainless steel per ASME B18.3.

Installation Notes

Install using a 9/64-inch hex key or T-handle Allen wrench; power down or de-energize any equipment before accessing fasteners in live electrical or HVAC panels. Verify thread engagement depth in the mating tapped hole before applying torque to avoid stripping the 8-32 thread. Stainless-to-stainless fastener pairs carry a galling risk — apply an appropriate anti-seize compound when threading into stainless tapped holes.