Gibraltar 68004G Step Block Clamp Set 52 Pc M12x1.75

Product Description

The GIBRALTAR 68004G is a 52-piece step block and clamp set designed for workholding applications on milling machines and machining centers equipped with T-slot tables. The set centers on an M12x1.75 stud thread size and fits 16 mm T-slots, with a step block width and T-slot nut width of 25 mm. It delivers a complete, ready-to-use workholding solution for machinists and toolroom professionals who need to secure workpieces quickly and reliably. The set ships in a organized holder that keeps all components sorted and accessible at the machine.

This set is suited for production machine shops, toolrooms, and job shops running vertical milling machines, knee mills, or machining centers with 16 mm T-slot tables. Six stud lengths ranging from 80 mm to 200 mm allow technicians to clamp workpieces of varying heights without sourcing additional hardware. The included T-slot cleaner helps maintain table condition during setup and teardown. This is a standard fit for metalworking operations where repeatable, secure fixturing is required.

Key Features

• 52-piece complete set includes studs, coupling nuts, flange nuts, serrated end clamps, step blocks, T-slot nuts, a holder, and a T-slot cleaner
• M12x1.75 stud thread size for compatibility with standard metric workholding hardware
• Fits 16 mm T-slot tables with 25 mm step block and nut width
• Six stud lengths — 80, 110, 125, 150, 175, and 200 mm — accommodate a wide range of workpiece heights
• Serrated end clamps provide positive grip and resist workpiece movement under cutting loads
• Organized holder keeps all 52 components indexed and ready for fast setup

Compatibility

Designed for use with milling machine T-slot tables accepting a 16 mm T-slot and M12x1.75 threaded studs with a 25 mm nut width.

Installation Notes

Installation is performed by machinists or toolroom technicians. Power down and lock out the machine spindle before setting up or adjusting clamps on the table. Ensure the T-slot is free of chips and debris — use the included T-slot cleaner — before seating T-slot nuts to prevent improper seating and potential clamp failure. Tighten all studs and flange nuts to a snug, firm hold; do not use impact tools on the threaded studs.