Gagemaker manufactures standard ball and special application contact points and contact points for our API Gages and Pitch Diameter Gages. The contact points are made of spherical carbide and are interchangeable between gages. Contact point diameters are manufactured to tolerances of +.0002”. Most gages require two contact points. Both threaded and straight shanks are available. Threaded shanks are #4-48 UNF. Metric and special diameter contact points are quoted upon request.