Armor Coat UST235950 Hex Socket Cap Screw 5/16-18

Product Description

The ARMOR COAT UST235950 is a hex socket cap screw designed for demanding fastening applications in mechanical, HVAC, and industrial assemblies. It features a 5/16-18 UNC thread and measures 3.5 inches in length under the head. The fastener is partially threaded, which provides a smooth shank section for load-bearing and alignment applications. Constructed from alloy steel and finished with an Armor Coat coating for corrosion resistance, this screw meets ASME B18.3 dimensional standards. The 1/4 inch hex drive accepts standard hex keys and socket tools. Tradespeople working on equipment panels, brackets, and mechanical assemblies will find this screw suitable for both new installation and replacement work.

This screw is appropriate for use in commercial and residential mechanical systems where a high-strength, corrosion-resistant threaded fastener is required. Common applications include securing equipment housings, brackets, access panels, and structural components in HVAC, plumbing, and general mechanical assemblies. The partially threaded shank makes it well suited for applications requiring precise joint clamping or where thread engagement must be limited to a specific zone. Installers working under NEC, IFGC, or IPC guidelines will recognize this screw type as a standard component in equipment mounting and panel work.

Key Features

• 5/16-18 UNC thread size for reliable engagement in standard tapped holes
• 3.5 inch length under head suits medium-depth fastening applications
• Partially threaded shank provides a smooth bearing surface for precise clamping
• Alloy steel construction delivers high tensile strength for demanding assemblies
• Armor Coat finish provides corrosion protection in exposed or humid environments
• Meets ASME B18.3 dimensional standard for consistent fitment with standard tooling

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw for use in any application requiring a 5/16-18 UNC partially threaded fastener with a 1/4 inch hex drive.

Installation Notes

Install using a 1/4 inch hex key or socket driver; ensure the mating tapped hole is clean and free of debris before driving. Power down or de-energize any equipment before accessing internal fastener points on electrical or HVAC panels. Do not overtighten alloy steel fasteners in softer base materials such as aluminum - follow equipment manufacturer torque guidance where available. Inspect the Armor Coat finish before installation; damaged coating may reduce corrosion resistance in wet or outdoor environments.