JBO Thread Ring Gauge (NoGo) - UNC - Left Hand - 2A - 1 1/4 x 7 Face Mill Arbors - Anti-Vibration repeatable fit in standard tool

repeatable fit in standard tool holders and maintains tight size control for repeatable results across batches

this left-hand GO gauge features a 6H tolerance and a precise M55 x 2 thread size

ensuring correct identification of compliant holes and preventing assembly mismatches

Rigid Tapping for Precision: Rigid engagement ensures accurate thread pitch and clean finishes

Through coolant and flute geometry: Through coolant delivery and a straight shank with a left-hand spiral flute and right-hand cutting work together to improve heat management

JBO Thread Ring Gauge (NoGo) - UNC - Left Hand - 2A - 1 1/4 x 7 Face Mill Arbors - Anti-Vibration repeatable fit in standard toolThe JBO Thread Ring Gauge (NoGo) UNC Left Hand 2A 1 1 4 x 7 is a precision inspection tool designed to verify external thread diameters according to Unified Thread Standards. Its ideal for manufacturing, automotive, aerospace, and maintenance environments where quick, reliable thread checks keep production moving and parts fitting correctly. NoGo design for fast, unambiguous checks: The NoGo profile provides a clear pass fail indication for threads