Value Collection MP39429 Hex Head Cap Screw 9/16-18x1 Grade 8

Product Description

The VALUE COLLECTION MP39429 is a fully threaded hex head cap screw designed for high-strength fastening applications in mechanical, industrial, and structural assemblies. It features a 9/16-18 UNF thread size with a 1-inch length under head, manufactured from Grade 8 steel with a zinc yellow dichromate finish for corrosion resistance. The hex head drive style accepts standard hex wrenches and sockets. This fastener meets ASME B18.2.1 dimensional standards, making it a reliable choice for professionals who need a verified, spec-compliant fastener in critical joint assemblies.

This cap screw is suited for high-load bolted connections where a fine-thread UNF fastener is required. Grade 8 steel provides elevated tensile and proof load strength compared to lower-grade fasteners, making it appropriate for automotive, heavy equipment, agricultural machinery, and general industrial maintenance. The zinc yellow dichromate finish provides a baseline level of corrosion protection suitable for indoor and mildly exposed environments. Mechanics, millwrights, and maintenance technicians commonly use this fastener type when torquing into tapped steel or when pairing with a Grade 8 compatible nut and washer.

Key Features

• 9/16-18 UNF fine thread for precise clamping and resistance to loosening under vibration
• Grade 8 steel construction for high tensile strength in demanding applications
• Zinc yellow dichromate finish provides corrosion and oxidation resistance
• Fully threaded along the entire shank length under head
• Conforms to ASME B18.2.1 dimensional standards
• Hex head style compatible with standard sockets and open-end wrenches

Compatibility

Designed as an OEM-style replacement or service fastener for bolted assemblies requiring a 9/16-18 UNF Grade 8 hex head cap screw with a 1-inch length under head.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician familiar with high-strength fastener torque procedures. Always verify thread engagement depth and mating thread condition before installation. Do not mix Grade 8 fasteners with lower-grade nuts or threaded inserts not rated for the load. Follow applicable industry or equipment manufacturer torque specifications for the joint being assembled.