Value Collection D39407 Hex Head Cap Screw 1/2-20 X 1-3/4 in

Product Description

The VALUE COLLECTION D39407 is a fully threaded hex head cap screw designed for high-strength fastening applications in mechanical, industrial, and structural assembly work. Built to Grade 8 steel specifications, this fastener meets the elevated tensile and proof load requirements demanded by heavy-duty bolted joints. The 1/2-20 UNF thread profile delivers fine-thread engagement for applications where vibration resistance and precise clamping force are priorities. A zinc yellow dichromate finish provides corrosion protection suitable for general service environments. Machinists, millwrights, and maintenance technicians routinely specify Grade 8 UNF fasteners for critical joints in equipment assemblies, brackets, and structural connections.

This screw is suited for use in equipment manufacturing, machinery maintenance, and fabrication work where fine-thread, high-strength fasteners are required. The 1/2-20 UNF thread size is commonly found in automotive, agricultural, and industrial equipment applications. Full threading along the 1-3/4-inch length under head allows maximum thread engagement across varying material thicknesses, making it appropriate for through-bolting and blind-hole configurations alike. Minimum order quantity is 25 pieces per order.

Key Features

• Grade 8 steel construction meets high tensile and proof load requirements for critical fastening joints
• 1/2-20 UNF fine-thread profile provides enhanced vibration resistance compared to coarse-thread equivalents
• Fully threaded shank maximizes thread engagement across varied material thicknesses
• Zinc yellow dichromate finish delivers corrosion resistance for general indoor and light-duty outdoor service
• Conforms to ASME B18.2.1 dimensional standards for consistent fit and interchangeability

Compatibility

Designed as a standard-dimension hex head cap screw per ASME B18.2.1, compatible with any 1/2-20 UNF tapped hole or mating nut requiring a Grade 8 fastener.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a standard hex wrench or socket drive sized for a 1/2-inch Grade 8 hex head. Always ensure mating threads are clean and free of debris before assembly. When used in safety-critical joints, torque to the value specified by the equipment manufacturer or applicable engineering standard. Do not reuse fasteners that show signs of thread damage, corrosion, or deformation.