Bowmalloy 36064 Hex Head Cap Screw 3/8-16 X 3.5 in Grade 9

Product Description

The BOWMALLOY 36064 is a partially threaded hex head cap screw designed for high-strength fastening applications in mechanical, structural, and industrial assemblies. It features a 3/8-16 unified coarse thread and a 3.5-inch length under head. Manufactured from Grade 9 alloy steel, this fastener delivers tensile strength well beyond standard Grade 5 or Grade 8 hardware. A clear zinc chromate finish provides corrosion resistance in shop and field environments. Licensed tradespeople, millwrights, and industrial mechanics reach for Grade 9 hardware when load requirements demand maximum performance from a standard hex head profile.

This cap screw suits heavy-duty bolted connections in manufacturing equipment, agricultural machinery, hydraulic assemblies, and other applications where high-clamp-load and vibration resistance are critical. The 3/8-16 coarse thread engages quickly and resists cross-threading in field conditions. The partial threading allows the unthreaded shank to act as a precision locating feature or shear-load bearing surface in close-tolerance bores. Sold in packages of 50, the 36064 is well suited for maintenance shops and contractors stocking standard fastener sizes.

Key Features

• Grade 9 alloy steel construction for tensile strength exceeding standard Grade 8 hardware
• 3/8-16 unified coarse thread for broad tool and nut compatibility
• 3.5-inch length under head accommodates thick stack-ups and deep engagement
• Partially threaded shank supports shear loading and close-tolerance locating
• Clear zinc chromate finish for corrosion protection in shop and outdoor environments
• Inch measurement system for compatibility with standard SAE tooling and hardware

Compatibility

Designed as an OEM-style and aftermarket replacement hex head cap screw for any application requiring a 3/8-16 coarse-thread fastener with a 3.5-inch length under head in Grade 9 alloy steel.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson following the torque specifications published by the equipment manufacturer for Grade 9 fasteners. Always use a calibrated torque wrench and apply the correct SAE-grade nut or tapped hole rated for the load. Inspect the mating threads and seating surface for damage before assembly. De-energize and lockout all equipment per OSHA lockout/tagout procedures before performing fastener replacement on live machinery.