JBO Thread Plug Gauge - UNC Go-No/Go - Left Hand - 2B - 1 3/8 x 6 Face Mill Arbors - Anti-Vibration and quality inspectors quickly determine

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

It’s designed for finishing drilled holes to ISO H4 tolerance

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

It’s a dependable tool that you can trust to deliver precise checks and long-lasting performance in a professional setting

producing cleaner profiles on intricate parts and reducing wear on the cutting edges

JBO Thread Plug Gauge - UNC Go-No/Go - Left Hand - 2B - 1 3/8 x 6 Face Mill Arbors - Anti-Vibration and quality inspectors quickly determineThe 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