Value Collection D39135 Hex Head Cap Screw 9/16-12 X 2.5 in

Product Description

The VALUE COLLECTION D39135 is a 9/16-12 hex head cap screw measuring 2.5 inches under the head, manufactured from Grade 8 steel with a zinc yellow dichromate finish. Grade 8 is the highest common SAE strength grade for inch-series fasteners, making this screw appropriate for high-load structural and mechanical joint applications. The partial threading leaves a smooth shank section beneath the head, which helps align mating components and resist shear forces. This fastener conforms to ASME B18.2.1 dimensional standards, ensuring consistent head geometry and thread engagement across compatible hardware. Tradespeople, maintenance technicians, and assembly professionals working with heavy equipment, structural steel, or machinery will find this screw suited to demanding applications.

This screw is used in industrial, commercial, and mechanical assembly applications where high tensile strength and corrosion resistance are required. The zinc yellow dichromate finish provides a baseline level of corrosion protection suitable for indoor and light outdoor exposure. Typical installation scenarios include bolted machinery mounts, structural steel connections, equipment frames, and maintenance repairs on agricultural, construction, or manufacturing equipment. The UNC thread form is the standard coarse thread series for inch fasteners, making replacement and sourcing straightforward in most shop environments.

Key Features

• Grade 8 steel construction for high tensile and proof load strength in demanding fastener applications
• 9/16-12 UNC coarse thread form for broad compatibility with standard inch-series hardware
• 2.5 inches length under head with partial threading to support shear resistance and component alignment
• Zinc yellow dichromate finish provides corrosion protection and visual identification as a high-strength fastener
• Conforms to ASME B18.2.1 for consistent dimensional tolerances and interchangeability

Compatibility

Designed as a standard inch-series hex head cap screw compatible with 9/16-12 UNC threaded holes and nuts meeting ASME B18.2.1 specifications.

Installation Notes

Installation is typically performed by maintenance technicians, millwrights, or mechanical assemblers using a standard hex wrench or impact tool sized for a 9/16-12 fastener. Ensure mating threads are clean and free of debris before installation. Apply thread-locking compound or hardened washers as required by the joint design or applicable equipment service documentation. Torque to values specified by the equipment manufacturer or applicable structural standards for Grade 8 fasteners at this thread size.