Gage Assembly
Chicago based Gage Assembly was established in 1953 manufacturing standard and special thread plug and thread ring gages for virtually every type of thread. American inch UNF, UNC, metric thread gages, acme, buttress, straight and tapered pipe thread gages, left hand, pre-plate, Whitworth, multiple lead thread plug, and thread rings inch are all available. Size capabilities run from 000-120 threads per inch to 15 ½ inch diameter and one thread per inch.