Gibraltar 9513SS-G Ball End Clamping Screw 5/16-18 Stainless

Product Description

The GIBRALTAR 9513SS-G is a headless ball end clamping screw designed for workholding and fixture applications in industrial and machining environments. This screw features a plain flat face ball end and a 5/16-18 UNC thread, giving it reliable clamping force with a low-profile, headless design that sits flush when fully engaged. The overall length is 1 inch, and the ball diameter measures 0.147 inches. Constructed from 18-8 stainless steel throughout, it resists corrosion in coolant-exposed or high-humidity shop environments. Machinists, toolmakers, and fixture builders are the primary installers of this fastener.

This clamping screw is used in jigs, fixtures, toggle clamps, and workholding assemblies where a headless profile is required to avoid interference with mating components. The plain flat face ball end provides consistent contact and smooth pivoting action against clamping pads or workpiece surfaces. Its compact size suits both light-duty bench fixtures and precision tooling setups. The 5/32-inch hex key drive allows engagement in tight or recessed locations common in modular fixturing systems.

Key Features

• Headless design eliminates head interference in flush or recessed installations
• Plain flat face ball end for consistent contact and pivot action
• 5/16-18 UNC thread for broad compatibility with standard fixture hardware
• 18-8 stainless steel construction for corrosion resistance in wet machining environments
• Ball diameter of 0.147 inches suits compact clamping pad interfaces
• 5/32-inch hex key drive allows use in confined or recessed locations

Compatibility

Designed as a standard replacement or supplemental component for jigs, fixtures, and workholding assemblies that use 5/16-18 UNC threaded clamping screws with a headless, ball end configuration.

Installation Notes

Installation is performed by machinists or toolmakers using a 5/32-inch hex key. Ensure the mating threaded hole is clean and free of debris before threading in the screw. Do not overtighten, as the ball end and contact surface can be damaged by excessive torque. Stainless steel fasteners are susceptible to galling — apply an appropriate anti-seize compound to the threads if frequent removal is expected.