Bowmalloy 36036 Hex Head Cap Screw 5/16-18 X 2-3/4 in Grade 9

Product Description

The BOWMALLOY 36036 is a Grade 9 alloy steel hex head cap screw with a 5/16-18 UNC thread and a 2-3/4 inch length under head. It is partially threaded, which allows for a stronger clamping grip in through-bolt and structural fastening applications. The clear zinc chromate finish provides corrosion resistance in mild service environments. This fastener is typically installed by millwrights, pipefitters, HVAC mechanics, or general trade professionals who need a high-strength imperial-thread cap screw for equipment mounting, bracketing, or structural assembly work.

Grade 9 alloy steel cap screws are used in demanding mechanical and industrial fastening applications where higher proof load and tensile strength are required compared to Grade 5 or Grade 8 fasteners. The 5/16-18 thread size and 2-3/4 inch body length make this screw well suited for medium-duty equipment frames, fan and blower assemblies, panel mounting, and similar trade installations where a standard hex drive and reliable clamp load are needed.

Key Features

• Grade 9 alloy steel construction for elevated tensile and proof load strength
• Partial threading provides improved clamping force in unthreaded holes
• Clear zinc chromate finish for basic corrosion resistance
• 5/16-18 UNC coarse thread for compatibility with standard imperial tapped holes
• Hex head drive accepts standard SAE hex sockets and wrenches

Compatibility

Designed as an OEM-style replacement or stock fastener for equipment and assemblies requiring a 5/16-18 UNC partially threaded hex head cap screw in Grade 9 alloy steel.

Installation Notes

Install using a calibrated torque wrench sized for the 5/16-18 thread specification required by the equipment manufacturer. Power down and de-energize any equipment before removing or replacing structural fasteners. Follow applicable mechanical and structural codes for the installation environment. Do not substitute a lower-grade fastener in applications that specify Grade 9 minimum strength.