Gibraltar 20412G 52 Piece Step Block Clamp Set

Product Description

The GIBRALTAR 20412G is a 52-piece step block and clamp set designed for workpiece fixturing on milling machines, drill presses, and similar machining equipment. The set includes step blocks, clamp straps, studs, nuts, and washers needed to secure workpieces directly to T-slot tables. Step blocks are 1 inch wide and compatible with 7/16 inch T-slots. Studs are threaded 3/8-16 and come in six lengths: 3, 4, 5, 6, 7, and 8 inches, giving machinists the flexibility to accommodate workpieces of varying thicknesses. Nut width is 11/16 inch. The complete set ships as a single packaged unit weighing 18.5 pounds.

This fixturing set is suited for use in machine shops, tool rooms, and production environments where workpieces must be clamped securely to T-slot machine tables. It supports a wide range of setups including face milling, boring, and drilling operations. The six available stud lengths allow techs and machinists to stack step blocks and build up clamping height as needed without sourcing additional hardware. The set is intended for professional trade and industrial use.

Key Features

• 52-piece complete fixturing set — studs, step blocks, clamps, nuts, and washers included
• 1 inch step block width fits standard T-slot table setups
• 7/16 inch T-slot compatibility for common milling and drill press tables
• 3/8-16 stud thread for reliable holding force across all included stud lengths
• Six stud lengths (3, 4, 5, 6, 7, and 8 inches) to accommodate varying workpiece and step block stack heights
• 11/16 inch nut width for use with standard wrenches

Compatibility

Designed for use with machine tool tables featuring 7/16 inch T-slots. Suitable for milling machines, drill presses, and other equipment with standard T-slot clamping surfaces that accept 3/8-16 threaded studs.

Installation Notes

Installation is typically performed by a machinist or skilled trades professional prior to machining operations. Power down and lock out the machine before setting up or adjusting any fixturing hardware. Ensure studs are fully engaged in the T-slot nut and that clamp straps are level or angled slightly toward the workpiece for maximum holding force. Do not overtighten nuts beyond hand-snug plus a controlled torque appropriate for the stud diameter — consult applicable shop standards for proper clamping procedure.