Thread Check Inc offers Gagemaker contact points for measuring pitch diameters on threads.
Gagemaker manufactures standard and special application contact points for their API Gages and Pitch Diameter Gages. The contact points are made of spherical carbide and can be interchanged between gages. Contact point diameters are made to a +.0002 tolerance. Two contact points are required for most Gagemaker thread gages. Contact points can be supplied with both threaded and straight shanks. Threaded shanks feature a #4-48 UNF thread. Metric and special diameter contact points are quoted upon request.