Bowmalloy 36028 Hex Head Cap Screw 5/16-18 X 7/8 in Grade 9

Product Description

The BOWMALLOY 36028 is a fully threaded hex head cap screw designed for high-strength fastening applications across mechanical, structural, and equipment assembly work. It carries a 5/16-18 thread size with a 7/8-inch length under the head, manufactured from Grade 9 alloy steel for exceptional tensile strength. The clear zinc chromate finish provides corrosion resistance in both indoor and outdoor environments. This screw is sized and graded for applications where standard Grade 5 or Grade 8 fasteners are insufficient, making it a go-to choice for heavy equipment, hydraulic fittings, and structural connections requiring superior clamping force.

This fastener suits a wide range of trade and industrial applications including HVAC equipment mounting, plumbing bracket assembly, electrical enclosure fabrication, and general mechanical service work. The 5/16-18 coarse thread pattern seats quickly and holds reliably in steel, cast iron, and machined alloy components. Sold in a package quantity of 100 units, it is well suited for contractors and service shops that need reliable stock of high-grade fasteners on hand for repeat applications.

Key Features

• Grade 9 alloy steel construction delivers higher proof load and tensile strength than Grade 8 fasteners
• Fully threaded 5/16-18 UNC coarse thread for fast engagement and consistent clamping
• Clear zinc chromate finish provides corrosion resistance in typical service environments
• 7/8-inch length under head fits standard clearance and blind-hole applications at this thread size
• Package quantity of 100 supports production, service fleet, and shop stocking needs

Compatibility

Designed as a standard inch-series hex head cap screw for use in any application calling for a 5/16-18 x 7/8-inch Grade 9 alloy steel fastener per inch-standard fastener specifications.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson using a properly sized hex wrench or socket driver. Always verify thread engagement depth and mating material hardness before final torque. Avoid mixing fastener grades within the same joint assembly. Follow applicable equipment manufacturer torque specifications and relevant industry standards such as ASME B18.2.1 for hex cap screws.