Gibraltar 41403G Blind Tapped T-slot Nut 5/16-18

Product Description

The GIBRALTAR 41403G is a blind tapped T-slot nut designed for securing fixtures, jigs, and workholding components in T-slot tracks on machine tables, aluminum extrusions, and similar tooling setups. Machined from 1018 steel with a black oxide finish, this nut features a 5/16-18 right-hand thread and a blind tap design that prevents chips and coolant from passing through the back of the nut. The base measures 5/8 inches wide by 1/4 inch tall, and the overall length is 7/8 inches. Machinists, tool and die technicians, and fixturing specialists install this type of hardware during workholding setup and machine table configuration.

This T-slot nut fits 3/8-inch-wide T-slots and is sized for 10.00 mm table slot applications. It is well suited for use on milling machine tables, drill press tables, surface grinders, and similar metalworking equipment that uses standard T-slot tracks. The blind tapped design makes it a preferred choice in environments where through-holes are not acceptable and where a clean, chip-resistant thread pocket is required.

Key Features

• Blind tap design keeps threads clear of chips, coolant, and debris
• 5/16-18 right-hand thread for standard inch-system fastener compatibility
• Fits 3/8-inch T-slots and 10.00 mm metric table slot equivalents
• 1018 steel construction for reliable strength in tooling applications
• Black oxide finish provides mild corrosion resistance in shop environments
• Compact base profile: 5/8 inches wide by 1/4 inch tall

Compatibility

Designed for use in T-slot tracks with a 3/8-inch slot width, equivalent to a 10.00 mm table slot. Suitable for standard inch-system machine tables and aluminum extrusion T-slot systems that accept this slot dimension.

Installation Notes

Installation is performed by machinists or tooling technicians during workholding and fixturing setup. Power down and lock out the machine before inserting or repositioning T-slot nuts on the table. Slide the nut into the T-slot track from an open end, rotate 90 degrees to engage the base flanges, and thread the mating fastener in by hand before applying final torque with the appropriate wrench. Inspect threads for debris before assembly to ensure full thread engagement.