JBO Thread Plug Gauge - UNC Go-No/Go - Left Hand - 2B - 1 3/8 x 6 Face Mill Arbors - Anti-Vibration Ideal for enlarging existing holes

Ideal for enlarging existing holes or achieving a specified bore in a variety of metals and alloys

DIN 8093 / ISO H4 tolerance: Delivers a precise hole size within a defined standard

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

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 Ideal for enlarging existing holesThe 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