Bowmalloy 36404 Hex Head Cap Screw 1/2-20 X 1 in Grade 9

Product Description

The BOWMALLOY 36404 is a fully threaded hex head cap screw engineered for high-strength fastening applications in mechanical, structural, and industrial assemblies. Built from Grade 9 alloy steel, this fastener delivers tensile strength well above standard Grade 5 and Grade 8 hardware, making it appropriate for demanding load-bearing connections. The 1/2-20 unified fine thread profile provides precise thread engagement and superior resistance to vibration loosening. A zinc-plated clear chromate finish adds a baseline level of corrosion resistance for general service environments. Tradespeople and maintenance professionals working on heavy equipment, agricultural machinery, or structural fabrication will find this fastener suits critical joint requirements.

This screw is used across a wide range of commercial, industrial, and agricultural applications where high clamping force and vibration resistance are needed. The 1/2-20 fine thread designation is common in precision mechanical assemblies and equipment with thinner-walled threaded components. At 1 inch in length under the head, it fits standard through-bolt and blind-hole configurations typical in field repair and OEM assembly work. The fully threaded shank maximizes thread engagement across the full installed length.

Key Features

• Grade 9 alloy steel construction for tensile strength exceeding standard Grade 8 fasteners
• 1/2-20 unified fine thread for tight thread engagement and vibration resistance
• Fully threaded shank for maximum thread engagement along the full fastener length
• Zinc-plated clear chromate finish provides baseline corrosion protection in general service environments
• Inch measurement system for compatibility with standard SAE tooling and hardware

Compatibility

Designed as an OEM-style replacement or service fastener for assemblies requiring 1/2-20 fine thread hex head cap screws in Grade 9 alloy steel.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician familiar with proper fastener torque procedures for Grade 9 hardware. Always consult the equipment manufacturer torque specifications for the joint being serviced. Clean and inspect threaded holes before installation to ensure proper thread engagement and accurate torque readings. Use calibrated torque tooling appropriate for 1/2-inch fasteners and verify joint integrity after final tightening.