Gibraltar 842560-G Steel T-slot Bolt 1/2-13 Black

Product Description

The GIBRALTAR 842560-G is a Grade 5 steel T-slot bolt designed for use in T-slot tracks on machine tables, fixtures, and workholding systems. The bolt features a 1/2-13 UNC thread with a 2.5-inch thread length and a 6-inch length under the head, making it suitable for securing workholding clamps, stops, and accessories to slotted machine tables. The head width of 0.875 inches fits a 0.5-inch slot width, and the 0.34375-inch head height keeps the profile low when seated. A black finish provides basic corrosion resistance. Machinists, toolmakers, and fixture builders are the primary installers of this fastener.

This T-slot bolt is used in manufacturing and fabrication environments where components must be clamped or positioned along a T-slot track. Typical applications include milling machine tables, drill press tables, welding fixtures, and modular workholding setups. The 1/2-13 UNC thread is a standard coarse thread size commonly paired with T-nuts and step blocks in inch-based fixturing systems. The black finish suits industrial shop environments where appearance is secondary to function.

Key Features

• Grade 5 steel construction for reliable tensile strength in clamping applications
• 1/2-13 UNC coarse thread for compatibility with standard inch-system T-nuts and clamp hardware
• 0.5-inch slot width fits standard 1/2-inch T-slots on machine tables and fixture plates
• 6-inch length under head accommodates stacked clamp assemblies and step blocks
• Black finish for basic surface protection in shop environments
• Low-profile head at 0.34375 inches height seats fully within the T-slot channel

Compatibility

Designed for use in standard 1/2-inch T-slot tracks on machine tables, fixture plates, and modular workholding systems using inch-based 1/2-13 UNC hardware.

Installation Notes

Installation is typically performed by machinists or tool and die personnel using standard hand tools. Insert the T-slot bolt head into the open end of the T-slot track and slide it into position before threading on the T-nut or clamping hardware. Do not overtighten, as Grade 5 fasteners in T-slot applications are subject to the torque limits of the mating fixture hardware. Always de-energize and lock out any machine before adjusting workholding hardware on a machine table.