Value Collection -33715-1 Hex Socket Cap Screw 1-8 Unc

Product Description

The VALUE COLLECTION -33715-1 is a partially threaded hex socket cap screw designed for high-strength fastening applications in industrial and mechanical assemblies. It features a 1-8 UNC thread size with a 4-inch length under head, providing deep engagement for secure clamping in thick material stacks. The screw is manufactured from alloy steel and finished with a black oxide coating that provides moderate corrosion resistance and reduces surface reflectivity. Drive size is 3/4 inch hex, requiring a standard hex key or Allen-type driver. This fastener meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for demanding structural and machine-element fastening tasks.

This cap screw is used in general industrial maintenance, machine building, die and mold work, and heavy equipment assembly. The 1-8 UNC coarse thread and 4-inch under-head length make it a common choice when fastening thick flanges, brackets, or machine bases where a flush or recessed head profile is required. Mechanical maintenance technicians, machinists, and industrial assembly crews are the primary installers.

Key Features

• 1-8 UNC coarse thread for broad compatibility with standard tapped holes
• 4-inch length under head allows fastening through thick material stacks
• Partially threaded shank provides a smooth bearing surface for shear-load applications
• Alloy steel construction delivers high tensile strength per ASTM A574
• Black oxide finish offers mild corrosion resistance and low-glare appearance
• 3/4-inch hex drive fits standard hex keys and socket drivers
• Meets ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard 1-8 UNC hex socket cap screw suitable for any tapped hole or nut conforming to 1-8 UNC thread form per ASME/ANSI B18.3.

Installation Notes

Installation should be performed by a qualified machinist or mechanical technician using a calibrated hex key or torque wrench with the appropriate 3/4-inch hex bit. Always verify that the mating tapped hole thread form and depth are compatible before driving the fastener. De-energize, de-pressurize, or otherwise make safe any equipment before fastener installation or removal. Do not exceed the rated torque for the fastener grade as stamped or referenced in the applicable engineering specification.