Bowmalloy BOW36109 Hex Head Cap Screw 1/2-13 Grade 9

Product Description

The BOWMALLOY BOW36109 is a Grade 9 steel hex head cap screw sized 1/2-13 x 2-1/4 inches with partial threading and a Bowma-Guard zinc-plated clear chromate finish. Grade 9 fasteners deliver high tensile strength suited for demanding structural and mechanical assemblies. The partial thread design provides a smooth shank section for applications requiring bearing surfaces or precise shear loading. This fastener is installed by mechanics, millwrights, HVAC technicians, and general tradespeople wherever high-strength inch-series bolting is required.

This cap screw is used in industrial, commercial, and trade applications where a robust 1/2-13 UNC fastener is specified. Typical install scenarios include equipment mounting, structural connections, machinery frames, and mechanical assemblies. The Bowma-Guard finish provides corrosion resistance suitable for general indoor and moderate outdoor service environments. Package quantity is 25 pieces per pack with a minimum order quantity of 1 pack.

Key Features

• Grade 9 steel construction for high tensile strength in demanding assemblies
• 1/2-13 UNC thread size in the inch measurement system
• 2-1/4 inch length under head with partial threading for shank bearing applications
• Bowma-Guard zinc-plated clear chromate finish for corrosion protection
• Sold in packs of 25 pieces

Compatibility

Designed as an OEM-compatible replacement or new-installation fastener for any application specifying a 1/2-13 UNC Grade 9 hex head cap screw at 2-1/4 inches length under head.

Installation Notes

Install using a standard hex socket or open-end wrench sized for a 1/2-13 hex head fastener. Power down or de-energize any equipment before fastener work begins on mechanical assemblies. Follow applicable torque specifications from the equipment manufacturer or relevant industry standards such as ASME or SAE for Grade 9 fasteners. Do not substitute a lower-grade fastener in joints specified for Grade 9 material.