Bowmalloy BOW36480 Hex Head Cap Screw 3/4-16 X 4 in Grade 9

Product Description

The BOWMALLOY BOW36480 is a Grade 9 steel hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Measuring 3/4-16 thread size at 4 inches under the head, this partially threaded fastener provides a bearing surface under the head for clamping force without full-length thread engagement. The Bowma-Guard finish coating provides corrosion resistance suitable for demanding service environments. Licensed trades and industrial maintenance personnel specify Grade 9 hardware where standard Grade 5 or Grade 8 fasteners do not meet tensile or proof-load requirements.

This cap screw is used in heavy equipment assembly, agricultural machinery, hydraulic system mounting, and structural mechanical connections where high-clamp-load, fine-thread fasteners are required. The 3/4-16 fine thread pitch offers increased tensile strength and better resistance to loosening under vibration compared to coarse-thread equivalents. Partial threading is typical for applications requiring a smooth shank for shear loading or precise hole alignment.

Key Features

• Grade 9 steel construction for high tensile and proof-load strength
• 3/4-16 fine thread for improved vibration resistance and clamp load
• 4 inches under-head length with partial threading for shank shear capability
• Bowma-Guard finish coating for corrosion protection
• Inch measurement system for compatibility with standard SAE fastener tooling
• UNSPSC Code 31161501 for procurement and catalog classification

Compatibility

Designed as an OEM-style replacement or service fastener for any application specifying a 3/4-16 x 4 inch Grade 9 partially threaded hex head cap screw in inch-series hardware.

Installation Notes

Installation should be performed by a qualified mechanic or trades professional familiar with high-strength fastener procedures. Always degrease or inspect mating threads before installation and use a calibrated torque wrench to meet the manufacturer or equipment specification for Grade 9 hardware. Do not substitute a lower-grade fastener in a Grade 9-specified joint. Follow applicable industry standards such as ASME B18.2.1 for hex cap screw installation practices.