1/4-28 UNF 2B JO-PLUG®

Description Thread Size 1/4-28 UNF EDP Number SPE1428JP Tolerance Class 2B and 3B Thread Series UNF Threads Per Inch (TPI) 28 Go Basic Pitch Diameter (in.) 0.2268 Standard ASME B1.1 Calibration ISO 17025:2017 Accredited, NIST Traceable Certificate of Conformance Included at no charge Origin Made in USA — Warren, MI   Unified Series UNC & UNF, pitch diameters are (Go Basic) for Class 2B & 3B Standard Shaft Length: .625″ Standard Shaft Diameter: .200″ ( /- .0001″) (5mm metric /-.0025) C of C traceable to NIST and ISO/IEC 17025:2018 and ANSI/NCSL Z540-1-1994 Accreditation at no charge Precision JO-PLUGS® are designed to determine Basic Position and Basic Profile of threaded holes.  Thread grinding and inspection are performed in an ISO-17025:2017 A2LA Accredited facility, Certification #3692.01. This laboratory meets the requirements of ANSI/NCSL Z 540-1-1994 and ANSI/ASME B1.12-1991 and B1.16M-1984. A pitch diameter is a constant number and Precision JO-PLUGS® provide a calibrated pitch cylinder parallel to internal threads. The location and orientation of tapped holes is derived using the pitch cylinder axis of the threaded hole in accordance to ANSE/ASME Y14.5 2018.