Value Collection D39329 Hex Head Cap Screw 5/16-24 X 1 in

Product Description

The VALUE COLLECTION D39329 is a fully threaded hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Manufactured from Grade 8 steel with a zinc yellow dichromate finish, this fastener delivers superior tensile strength and corrosion resistance compared to lower-grade alternatives. The 5/16-24 UNF thread form provides fine-pitch engagement suitable for applications requiring precise torque control and resistance to vibration loosening. Compliant with ASME B18.2.1 and SAE J429 standards, this screw is a reliable choice for maintenance, repair, and original equipment assembly work.

This fastener is suited for use in automotive, heavy equipment, agricultural machinery, and general industrial environments where Grade 8 strength requirements apply. The 1-inch length under head and fully threaded shank make it appropriate for through-bolt applications and short-grip fastening scenarios. Machinists, millwrights, mechanics, and maintenance technicians commonly source this screw for both OEM replacement and production assembly tasks where fine-thread engagement and high preload capability are required.

Key Features

• Grade 8 steel construction meets SAE J429 minimum proof load and tensile strength requirements
• Zinc yellow dichromate finish provides corrosion inhibition and meets ASTM-class appearance standards
• 5/16-24 UNF fully threaded shank for maximum thread engagement over the full 1-inch under-head length
• Conforms to ASME B18.2.1 dimensional standards for consistent hex head geometry and interchangeability
• Fine-thread pitch resists loosening under vibration compared to coarse-thread equivalents

Compatibility

Designed as a standard UNF hex head cap screw for any application specifying a 5/16-24 x 1-inch Grade 8 fastener per ASME B18.2.1 and SAE J429.

Installation Notes

Installation is performed by mechanics, millwrights, or maintenance technicians using a standard hex wrench or socket. Always confirm mating thread condition and material compatibility before installation. Follow applicable torque specifications from the equipment manufacturer or applicable fastener standards rather than generic torque charts, as joint design affects required clamp load. Do not mix Grade 8 fasteners with lower-grade nuts or threaded inserts not rated for the corresponding load.