PMC Lone Star offers a wide range of products manufactured to the highest quality possible. All of
the gages manufactured by PMC Lone Star have one thing in common: unmatched accuracy and
durability. Field proven for almost a century, our master and working gages meet and exceed
specifications established by the American Petroleum Institute (A.P.I.) and are used as the benchmark
for calibration by the National Institute of Standards Technology (N.I.S.T.). PMC Lone Star strives to
offer our customers the highest possible value when it comes to their gaging requirements. PMC Lone
Star maintains the most complete source of Master Gages outside of N.I.S.T. All of our gages are made
of tool steel hardened to Rockwell C 60-62 and are cryogenically frozen to insure their stability. Each
gage is put through a series of in-process and final inspections with tolerances to ±0.0002 of an inch
(±5 µm). We then qualify each gage using a certified master gage, and provide a calibration report
detailing the measured dimensions and the serial number of the master gage used for the
inspection. The quality and reliability of our gages have made them the overwhelming choice of
coupling shops, pipe and tube mills around the world. PMC Lone Star stands ready with a trained
staff of gage experts to help you accomplish all of your gaging needs, whether they are API sanctioned
threads or premium proprietary connections. We look forward to serving your needs today and in the future.
API SPEC 7 GAGES WORKING/MASTERS
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