Gibraltar 30905G Clamp Strap 5/16 in Stud Carbon Steel

Product Description

The GIBRALTAR 30905G is a carbon steel clamp strap designed to secure workpieces on milling machines, drill presses, and similar machine tool setups. The radius nose profile distributes clamping load evenly across the workpiece surface, reducing the risk of surface damage during fixturing. It accepts a 5/16 inch-18 stud and provides 7/16 inch of travel to accommodate variations in workpiece height. The black finish offers basic corrosion resistance for shop-floor use. This clamp strap is a standard component used by machinists and toolmakers when building workholding setups on T-slot tables.

The 30905G suits general-purpose machine shop clamping applications on manual mills, knee mills, drill presses, and similar equipment with T-slot tables. At 1 inch wide, 1/2 inch high, and 2-3/4 inch overall length, it fits compact setups where space around the workpiece is limited. The non-serrated contact surface and radius nose make it appropriate for clamping finished or semi-finished parts where marring must be minimized. Installation requires a matching step block or strap clamp kit with a 5/16 inch-18 stud and nut.

Key Features

• Carbon steel construction provides strength and rigidity under clamping loads
• Radius nose distributes clamping force to reduce workpiece marring
• 5/16 inch-18 tap size is compatible with standard T-slot clamp studs and hardware
• 7/16 inch travel accommodates workpiece height variation within a setup
• Non-serrated contact surface suits finished and semi-finished part clamping
• Black finish provides basic corrosion resistance in shop environments

Compatibility

Designed for use with standard 5/16 inch-18 stud clamp sets and step block sets commonly used on T-slot machine tables in milling and drilling applications.

Installation Notes

Installation is performed by qualified machinists or toolmakers familiar with workholding setup practices. Always power down and lock out the machine before adjusting or repositioning clamp straps. The strap should be positioned as close to the workpiece as practical, with the step block or support placed at the same height or slightly higher than the workpiece to maximize clamping effectiveness. Do not overtighten the stud nut beyond the point of secure fixture, as excess torque can deflect thin workpieces or damage threads.