Kerk LEAD SCREWS are available in standard diameters from 1/8" (3.2mm) to 15/16" (23mm), with standard leads from .012" to almost 4" (0.30mm to 92mm) including metric and left hand threads. Custom sizes and leads can be special ordered. Most stock crews are manufactured from 303 stainless steel and are produced with Kerk's exclusive precision rolling process. Other materials are available on special order.

Positional bi-directional repeatability (with Kerk anti-backlash nut) is within 50 micro-inches (1.25 micron) and standard lead accuracy is better than 0.0006 in./in. (mm/mm). Lead accuracies are available to .0001 in./in. (mm/mm) with individual screw mapping optional (laser-interferometer verification). Kerk's total in-house manufacturing and quality control assure uniform and consistent products.