3/4 28 UN 2A STEEL NoGo Ring GAGE tool steel cold stabilized thread ring Rc 60-62 marked with size and tolerance Certificate of Accuracy is included NOTE: selection of a 2A & 3A is based on your requirements. A 2A class Ring will have a smaller (tighter) pitch diameter on both the Go and the No/Go members. Certificate of Accuracy is included.Click HERE to read about additional Long Form Cert.
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