Bowmalloy 36456 Hex Head Cap Screw 5/8-18 3-3/4 in Grade 9

Product Description

The BOWMALLOY 36456 is a Grade 9 alloy steel hex head cap screw with a 5/8-18 thread size and a 3-3/4-inch length under the head. It carries a zinc-plated clear chromate finish for corrosion resistance. The threading is partial, which is standard for cap screws of this length and is suited to applications requiring a defined grip length. Licensed trades and maintenance professionals use this fastener in structural, mechanical, and equipment-mounting applications where high-strength fasteners are required.

This cap screw is used in heavy-duty mechanical assemblies, equipment fabrication, and structural connections that demand a fine-thread, high-strength fastener. The 5/8-18 fine-thread pattern provides higher tensile and stripping resistance than coarse-thread equivalents, making it a common choice in precision machinery, automotive, and industrial equipment maintenance. It is sold in packages of 25 units.

Key Features

• Grade 9 alloy steel construction for high tensile strength in demanding applications
• 5/8-18 fine-thread pattern for superior thread engagement and clamping force
• 3-3/4-inch length under head accommodates assemblies with defined grip requirements
• Zinc-plated clear chromate finish provides baseline corrosion protection
• Partially threaded shank for proper grip-length performance in bolted joints
• Inch-system measurement standard for compatibility with standard tooling

Compatibility

Designed as a standard inch-series hex head cap screw for use in Grade 9-rated bolted joints and mechanical assemblies requiring a 5/8-18 fine-thread fastener.

Installation Notes

Installation is typically performed by mechanical technicians, millwrights, or maintenance electricians following applicable equipment manufacturer torque specifications. Always use the correct hex wrench or socket to avoid rounding the head. Ensure mating threads are clean and free of debris before installation. De-energize and lock out any machinery before replacing or installing fasteners in live equipment.