Bowmalloy BOW36479 Hex Head Cap Screw 3/4-16 X 3-3/4 in Grade 9

Product Description

The BOWMALLOY BOW36479 is a Grade 9 steel hex head cap screw sized 3/4-16 x 3-3/4 inches with partial threading and a Bowma-Guard protective finish. Grade 9 fasteners meet demanding strength requirements and are commonly specified in heavy-duty mechanical, agricultural, and industrial assemblies where standard Grade 5 or Grade 8 hardware is insufficient. The Bowma-Guard finish provides corrosion resistance suited for exposed or harsh-environment installations. This screw uses inch-series threading at 3/4-16, meaning a 3/4-inch diameter with 16 threads per inch in a fine-thread configuration. Partial threading allows the unthreaded shank to bear shear loads, making it appropriate for joints that see lateral stress.

This cap screw is used in industrial, agricultural, and heavy equipment applications where high-strength fasteners are required. Typical install scenarios include frame assemblies, implement mounting, drivetrain components, and structural joints in machinery that demands Grade 9 tensile performance. The fine-thread 3/4-16 pitch provides increased thread engagement and is preferred in applications requiring precise torque control or where vibration resistance is a priority. Partial threading is standard practice when joint design relies on shank bearing rather than full thread engagement through both members.

Key Features

• Grade 9 steel construction for high-tensile, heavy-duty fastening applications
• 3/4-16 fine-thread pitch for increased thread engagement and vibration resistance
• 3-3/4 inch length under head accommodates thick-stack or multi-member joints
• Partial threading design allows unthreaded shank to carry shear loads
• Bowma-Guard finish provides corrosion protection for exposed service environments
• Inch-series dimensioning compatible with standard SAE tooling and torque specs

Compatibility

Designed as a high-strength inch-series replacement or service fastener for heavy equipment, agricultural machinery, and industrial assemblies specifying a 3/4-16 x 3-3/4 inch Grade 9 hex head cap screw with partial threading.

Installation Notes

Installation of Grade 9 fasteners is typically performed by qualified mechanics or millwrights following equipment manufacturer torque specifications for the 3/4-16 thread size. Always de-energize and lock out equipment before accessing fastener locations in powered assemblies. Use a properly rated hex socket or wrench to avoid rounding the head. Inspect mating threaded holes for damage or debris before assembly to ensure full thread engagement and accurate torque readings.