Gibraltar 41427G Blind Tapped T-slot Nut 1-8 Thread

Product Description

The GIBRALTAR 41427G is a blind tapped T-slot nut designed for securing workpieces and fixtures to T-slotted machine tables and aluminum extrusion systems. Machined from 1018 steel with a black oxide finish, this nut features a 1-8 right-hand thread and fits a 1.125-inch slot width. The base measures 1.75 inches wide by 0.75 inches tall, with an overall length of 2 inches and an overall height of 1.5 inches. The blind tap keeps the threaded bore closed at one end, preventing chip and coolant intrusion into the slot channel. Machinists, toolmakers, and fixture builders install this hardware in production and job-shop environments.

This T-slot nut is suited for use on milling machine tables, surface plates, welding fixtures, and modular fixturing systems that use inch-dimensioned T-slots. The 1.125-inch slot width corresponds to a 29 mm table slot size, making it compatible with many standard machine tool tables. It is a straightforward drop-in component for building or rebuilding fixture assemblies that require a clean, closed-bottom threaded anchor.

Key Features

• Blind tapped bore keeps the thread closed at one end, blocking chips and coolant from entering the slot
• 1-8 right-hand thread provides coarse-pitch engagement suitable for high-clamping-load applications
• 1018 steel construction delivers solid tensile strength for machine table clamping duty
• Black oxide finish offers mild corrosion resistance in shop environments
• 1.125-inch slot width fits 29 mm T-slot table channels
• Inch system of measurement for compatibility with standard imperial fixturing hardware

Compatibility

Designed for use in machine table T-slots with a 1.125-inch (29 mm) slot width using inch-dimensioned fixturing hardware.

Installation Notes

Installation is performed by machinists or toolmakers as part of fixture assembly or machine table setup. Slide the nut into the T-slot channel before positioning the fixture component, then align and thread the clamping stud or bolt by hand before applying final torque. Ensure the machine table is clean and free of chips before installing the nut to prevent slot damage. Always de-energize and lock out the machine before performing any table or fixture work.