Gibraltar 821115-G Stud Nut Hook Clamp Assembly 1/2-13

Product Description

The GIBRALTAR 821115-G is a stud nut hook clamp assembly designed for secure workholding and fixturing applications. The assembly uses a 1/2-13 thread and features a body diameter of 0.999 inches and a body length of 2.5625 inches. The clamp face measures 0.8125 inches in height and 0.75 inches in width. Constructed from carbon alloy steel with a black oxide finish, this assembly delivers the clamping strength and corrosion resistance required in machining, tooling, and industrial fastening environments. Machinists, toolmakers, and maintenance technicians use this type of assembly to secure workpieces to machine tables or fixture plates.

This clamp assembly is suited for use on milling machines, drill presses, and fixture setups where a stud-and-nut clamping method is required. The hook-style clamp profile allows it to reach over stepped or irregular workpiece surfaces. Its 1/2-13 thread size fits standard T-slot stud configurations commonly found in general machining and production tooling setups. The black oxide finish helps reduce surface rust in shop environments.

Key Features

• 1/2-13 thread size fits standard T-slot stud configurations
• Body diameter of 0.999 inches and body length of 2.5625 inches
• Clamp face height of 0.8125 inches and width of 0.75 inches
• Carbon alloy steel construction for high clamping strength
• Black oxide finish for corrosion resistance in shop environments
• Hook clamp profile accommodates stepped or irregular workpiece surfaces

Compatibility

Designed as an OEM-style replacement or direct-use component for standard T-slot fixturing systems requiring a 1/2-13 stud nut hook clamp assembly.

Installation Notes

Installation is typically performed by machinists or toolmakers during workpiece setup. Ensure the machine table or fixture plate is powered down and the spindle is at rest before adjusting clamp position. Use the appropriate wrench size for the 1/2-13 nut and avoid over-tightening, which can distort the clamp face or damage the workpiece surface. Follow applicable shop safety and fixturing standards when setting up clamps for machining operations.