JBO Thread Plug Gauge - UNC Go-No/Go - Left Hand - 2B - 1 3/8 x 6 Face Mill Arbors - Anti-Vibration DIN 8093 / ISO H4

DIN 8093 / ISO H4 tolerance with straight shank: ensures precise fit and predictable performance in standard tooling configurations

and quality inspectors quickly determine whether threaded components conform to exact metric standards

this reamer supports smoother workflows

HSS‑E (M35 cobalt) durability: Enhanced wear resistance for longer tool life and consistent performance in demanding materials

repeatable hole dimensions suitable for production environments

JBO Thread Plug Gauge - UNC Go-No/Go - Left Hand - 2B - 1 3/8 x 6 Face Mill Arbors - Anti-Vibration DIN 8093 / ISO H4The JBO Thread Plug Gauge is a precision tool designed for testing internal UNC left hand threads in holes and threaded fittings. Built for manufacturers, automotive shops, aerospace facilities, and serious hobbyists, it provides fast, on the spot verification of thread conformity using a clear Go No Go result. Sized for 1 3 8 in. x 6 in. UNC left hand threads with 2B tolerance, this gauge helps ensure proper fit and reliable assembly. Go No Go