12-28 UNJF (Left Hand) 2A STEEL GO & NoGo set of Special setting and calibration gage plug
12-28 UNJF (Left Hand) (mil-S-8879 Aerospace Military & Government) 2A STEEL GO/No Go Special setting and calibration gage plug used to set up or calibrate split thread ring gages to ASME B 1.2 tool steel cold stabilized Rc 60-62 marked with size and tolerance Certificate of Accuracy is included. J specifications require that rings have rounded root radius on all Go rings with special marking on pugs. Long form certifications are strongly recommended for all UNJ style gages. Certificate of Accuracy is included.Click HERE to read about additional Long Form CERT. Click ADD below to add the gage to your cart. If you need the optional Long Form CERT Click on button below to add it to the cart. Use the back button to return to this page and click on Cart to check or modify your selections. You only require 1 long form cert for each gage purchased.