Bowmalloy BOW36111 Hex Head Cap Screw 1/2-13 X 2-3/4 in Grade 9

Product Description

The BOWMALLOY BOW36111 is a Grade 9 steel hex head cap screw with a 1/2-13 thread size and a 2-3/4 inch length under the head. It features partial threading and a Bowma-Guard zinc-plated clear chromate finish that provides corrosion resistance in demanding environments. This fastener is sized for high-strength bolted joint applications and carries the tensile rating associated with Grade 9 classification, making it suitable where standard Grade 5 or Grade 8 hardware is insufficient. Mechanical contractors, millwrights, and field service technicians working on heavy equipment, structural assemblies, and HVAC equipment frames commonly specify this grade of fastener.

The BOW36111 is used in industrial and commercial applications requiring a high-strength inch-series cap screw. Partial threading allows the unthreaded shank to bear shear loads across a joint, which is a common requirement in equipment mounting, bracket fabrication, and machinery assembly. It is appropriate for use in both indoor and outdoor installations where the Bowma-Guard coating provides adequate protection against moisture and mild chemical exposure.

Key Features

• Grade 9 steel construction for higher tensile strength than standard Grade 5 or Grade 8 fasteners
• 1/2-13 UNC thread size in the inch measurement system
• 2-3/4 inch length under the head with partial threading to carry shear loads on the unthreaded shank
• Bowma-Guard zinc-plated clear chromate finish for corrosion resistance
• Hex head drive for use with standard wrenches and sockets

Compatibility

Designed as a high-strength inch-series replacement or service fastener for bolted assemblies requiring a 1/2-13 thread and 2-3/4 inch grip length in steel construction.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson familiar with fastener torque requirements for Grade 9 hardware. Always consult the equipment manufacturer's torque specification table for the applicable joint before tightening. De-energize and lock out all equipment before removing or replacing fasteners in powered assemblies. Do not mix fastener grades within a single bolted joint.