Bowmalloy 36137 Hex Head Cap Screw 9/16-12 X 3 in Grade 9

Product Description

The BOWMALLOY 36137 is a Grade 9 alloy steel hex head cap screw designed for high-strength fastening applications in trade and industrial environments. Measuring 9/16-12 thread size with a 3-inch length under head, this fastener features partial threading and a clear zinc chromate finish for corrosion resistance. Grade 9 alloy steel delivers tensile strength above standard Grade 5 and Grade 8 fasteners, making it a go-to choice where elevated load ratings and vibration resistance are required. Electricians, HVAC installers, plumbers, and mechanical contractors reach for Grade 9 hex cap screws when specifications call for maximum clamp force in structural or equipment-mounting connections.

This fastener is suited for heavy-duty mechanical assemblies, equipment mounting, structural steel connections, and industrial machinery installations. The partial threading allows for a clean shank section in the grip area, which improves shear strength and prevents thread galling against mating materials. The clear zinc chromate coating provides a base level of corrosion protection appropriate for indoor and sheltered outdoor applications. Sold in a package quantity of 10 with a minimum order quantity of 1 package.

Key Features

• Grade 9 alloy steel construction for superior tensile and proof load strength
• 9/16-12 UNC thread size with 3-inch length under head
• Partial threading for improved shear strength in the grip zone
• Clear zinc chromate finish provides corrosion resistance
• Inch measurement system, standard UNC thread form
• Package quantity of 10 per pack

Compatibility

Designed as a standard inch-series UNC hex head cap screw for use in any application requiring a 9/16-12 thread pattern with a 3-inch grip length and Grade 9 alloy steel strength rating.

Installation Notes

Installation should be performed by qualified mechanical or trade personnel following applicable torque specifications from engineering drawings or recognized fastener standards such as those published by ASME or SAE for Grade 9 fasteners. Always ensure mating threads are clean and free of debris before installation. Do not mix metric and inch fasteners in the same assembly. Use appropriate hand tools or calibrated torque wrenches to achieve proper clamp load without overtorquing.