Value Collection 39387 Hex Head Cap Screw 7/16-20 X 3 in Grade 8

Product Description

The VALUE COLLECTION 39387 is a Grade 8 steel hex head cap screw designed for high-strength fastening in demanding mechanical and structural applications. Measuring 7/16-20 (UNF thread) with a 3-inch length under head, this fastener features partial threading and a zinc yellow dichromate finish that provides corrosion resistance in moderate-exposure environments. It conforms to ASME B18.2.1 dimensional standards. Sold in packages of 25, this screw is well-suited for maintenance crews, assembly technicians, and trade professionals who require dependable, specification-grade hardware.

The 39387 is appropriate for use in mechanical assemblies, equipment mounting, and structural connections where a fine-threaded, high-tensile fastener is required. The 7/16-20 UNF thread pitch is commonly found in automotive, HVAC equipment frames, pump assemblies, and general industrial machinery. Partial threading ensures that the unthreaded shank bears shear loads effectively in clearance-hole applications. This screw is packaged in quantities of 25, making it practical for both single-job use and recurring maintenance stock.

Key Features

• Grade 8 steel construction provides high tensile and proof load strength for demanding fastening applications
• 7/16-20 UNF thread standard ensures compatibility with fine-threaded nuts and tapped holes in that size
• 3-inch length under head accommodates moderate stack thicknesses in structural or mechanical assemblies
• Partial threading allows the unthreaded shank to carry shear loads in clearance-hole configurations
• Zinc yellow dichromate finish offers corrosion resistance and meets common industrial finishing specifications
• Conforms to ASME B18.2.1 for dimensional consistency and interchangeability

Compatibility

Designed as a standard inch-series hex head cap screw for use with 7/16-20 UNF nuts, threaded inserts, or tapped holes in mechanical and structural assemblies requiring Grade 8 fastener strength.

Installation Notes

Installation should be performed by a qualified mechanic or technician familiar with torque specifications for Grade 8 fasteners in the applicable assembly. Use a properly sized hex wrench or socket to avoid rounding the head. Always confirm thread engagement depth and hole condition before final tightening. Do not mix with metric fasteners or lower-grade hardware in the same joint.