JBO Thread Ring Gauge (NoGo) - BSP (G) - Left Hand - Tol. A - 1 1/2 x 11 S&E The 2‑flute geometry promotes fast

The 2‑flute geometry promotes fast chip clearance and reduces vibration

Tapered neck for stability and reduced chatter: The tapered design increases rigidity near the cutting zone

ISO H5 Tolerance on M2 HSS: Provides precise bore size (-0 to +0

Protective storage case: foam-inset storage keeps each collet secure and easy to reach

JBO Thread Ring Gauge (NoGo) - BSP (G) - Left Hand - Tol. A - 1 1/2 x 11 S&E The 2‑flute geometry promotes fastThe JBO Thread Ring Gauge (NoGo) for BSP (G) left hand threads is a precision inspection tool designed to verify external thread diameters on pipes and fittings. Sized to 1 1 2 x 11 and manufactured to Tol. A, it helps plumbers, engineers, and inspectors quickly identify compliant threads and prevent leaks by ensuring proper fit and sealing of BSP G connections. No Go design for fast conformance checks: The ring gauge features a dedicated no go