Bowmalloy 36035 Hex Head Cap Screw 5/16-18 X 2.5 in Grade 9

Product Description

The BOWMALLOY 36035 is a Grade 9 alloy steel hex head cap screw with a 5/16-18 UNC thread and a 2.5-inch length under the head. Grade 9 alloy steel delivers higher tensile and proof load ratings than Grade 5 or Grade 8 fasteners, making this screw a reliable choice for high-stress mechanical assemblies. The clear zinc chromate finish provides a base level of corrosion resistance while maintaining dimensional tolerances. The screw is partially threaded, which provides a shank section for shear load applications. Licensed tradespeople and mechanical contractors will recognize this fastener in structural and equipment-mounting applications where torque retention and clamping force are critical.

This fastener is suited for use in industrial equipment assemblies, HVAC unit mounting, electrical enclosure fabrication, and general mechanical trade work where a high-strength inch-series cap screw is specified. The 5/16-18 thread size is one of the most common fastener sizes found in light-to-medium structural connections on commercial and residential equipment. It is sold in quantities of 100 per package with a minimum order quantity of 1 package, making it practical for shop stock or field replenishment.

Key Features

• Grade 9 alloy steel construction for elevated tensile strength over standard Grade 5 and Grade 8 fasteners
• 5/16-18 UNC inch-series thread for broad compatibility with standard tapped holes and nuts
• 2.5-inch length under head accommodates thicker stack-ups and structural connections
• Partially threaded shank provides a bearing surface for shear load applications
• Clear zinc chromate finish offers baseline corrosion protection in indoor and sheltered environments
• Packaged in quantities of 100 for convenient shop stock or jobsite use

Compatibility

Designed for use in any application requiring a 5/16-18 UNC hex head cap screw with a 2.5-inch length under the head, Grade 9 alloy steel material grade, and clear zinc chromate finish in an inch-measurement fastener system.

Installation Notes

Installation should be performed by a qualified mechanic or trade professional using a properly sized hex wrench or socket. Always verify that the mating tapped hole or nut matches the 5/16-18 UNC thread specification before installation. Do not mix metric and inch fasteners in the same assembly. Torque to the specification listed in the equipment manufacturer's documentation for Grade 9 fasteners at this thread size.