Armor Coat UST235949 Hex Socket Cap Screw 5/16-18

Product Description

The ARMOR COAT UST235949 is a hex socket cap screw designed for high-strength fastening applications in mechanical, industrial, and trade installations. Sized at 5/16-18 UNC with a 3.25-inch length under head, this screw is partially threaded and manufactured from alloy steel with an Armor Coat finish for corrosion resistance. The 1/4-inch hex drive accepts standard hex keys and Allen drivers. It conforms to ASME B18.3, the recognized standard for socket cap screws in the United States. Mechanical contractors, pipefitters, millwrights, and industrial maintenance technicians commonly specify this fastener where controlled torque and flush or recessed head clearance are required.

This fastener suits structural and mechanical assemblies that call for a 5/16-18 UNC thread engagement with partial threading along the shank. The partial thread design allows the unthreaded shank to bear shear loads, making it appropriate for applications where both tensile and shear forces are present. It is well suited for equipment mounting, bracket attachment, and panel or enclosure assembly in commercial and light industrial environments where an Armor Coat finish provides added protection against moisture and mild chemical exposure.

Key Features

• 5/16-18 UNC thread size for broad tooling and hardware compatibility
• 3.25-inch length under head with partial threading for combined shear and tensile load bearing
• 1/4-inch hex socket drive for use with standard hex keys and T-handle drivers
• Alloy steel construction provides high tensile and yield strength
• Armor Coat finish adds corrosion resistance over bare alloy steel
• Conforms to ASME B18.3 dimensional and performance standards

Compatibility

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

Installation Notes

Installation requires a 1/4-inch hex key or Allen driver; use a torque wrench with the appropriate hex bit adapter when a specific torque value is required by the equipment manufacturer. Ensure mating threads are clean and free of debris before installation. Minimum order quantity is 50 pieces per order. Follow applicable mechanical codes and equipment manufacturer guidelines for fastener seating and preload requirements.