Gibraltar HJS-580-G Adjustable Locating Screw 1/4-28

Product Description

The GIBRALTAR HJS-580-G is an adjustable locating screw designed for precise positioning and clamping applications in machining, fixturing, and tooling setups. Threaded at 1/4-28 UNF with an overall length of 1.5 inches, this screw uses a hex-drive configuration with a 3/8-inch width across flats and a 3/16-inch hex height. Constructed from steel with a black oxide finish, it resists corrosion while maintaining dimensional accuracy under repeated use. Machinists, toolmakers, and fixture builders use this type of locating screw when repeatable part positioning is required on jigs, fixtures, and workholding devices.

This adjustable locating screw is suited for light industrial and precision machining environments where fine-thread adjustment and positive part contact are needed. The 1/4-28 fine thread provides accurate depth control with minimal backlash, making it appropriate for fixture plates, drill jigs, and similar tooling components. It is packaged and sold individually, making it a practical replacement or addition to existing fixture assemblies.

Key Features

• 1/4-28 UNF fine thread for precise depth adjustment with minimal backlash
• 1.5-inch overall length suitable for standard fixture plate depths
• 3/8-inch width across flats for wrench-driven installation and adjustment
• Steel construction provides strength and durability in tooling applications
• Black oxide finish adds corrosion resistance without significant dimensional change

Compatibility

Designed as a direct-fit adjustable locating screw for jigs, fixtures, drill plates, and workholding assemblies using 1/4-28 UNF threaded locating screw positions.

Installation Notes

Installation is performed by machinists or toolmakers using a standard hex wrench sized for a 3/8-inch width across flats. Thread the screw into the fixture body and adjust to the required depth before locking in place according to the fixture design. Ensure the mating threads in the fixture plate are clean and free of debris before installation to avoid galling the steel threads.