JBO 1/4in x 20TPI UNC Go Left Hand Thread Ring Gauge 2A UNC (Unified Coarse) - 502408 Premium German made UNC Left Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 101.99 1
JBO 1/4in x 20TPI UNC Go Thread Ring Gauge 3A UNC (Unified Coarse) - 502407 Premium German made UNC Right Hand Go Thread Ring Gauge. For checking to a 3A tolerance. GBP 101.99 1
JBO 1/4in x 32TPI UNEF Go Thread Ring Gauge 2A UNEF - 501313 Premium German made UNEF Right Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 99.99 1
JBO 1/4in x 28TPI UNF Go Thread Ring Gauge 2A UNF (Unified Fine) - 502458 Premium German made UNF Right Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 72.99 1
JBO 1/4in x 32TPI UNEF Go Left Hand Thread Ring Gauge 2A UNEF - 501315 Premium German made UNEF Left Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 149.99 1
JBO 1/4in x 20TPI UNJC Go Thread Ring Gauge 3A UNJC - 547027 Premium German made UNJC Right Hand Go Thread Ring Gauge. For checking to a 3A tolerance. GBP 159.99 1
JBO 1/4in x 20TPI UNC Go Thread Ring Gauge 2A UNC (Unified Coarse) - 502406 Premium German made UNC Right Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 60.99 1
JBO 1/4in x 28TPI UNF Go Thread Ring Gauge 3A UNF (Unified Fine) - 502459 Premium German made UNF Right Hand Go Thread Ring Gauge. For checking to a 3A tolerance. GBP 101.99 1
JBO 1/4in x 36TPI UN No-Go Thread Ring Gauge 2A UN (Unified) - 501232 Premium German made UN Right Hand No-Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 299.99 1
JBO 1/4in x 32TPI UNEF No-Go Thread Ring Gauge 2A UNEF - 500019 Premium German made UNEF Right Hand No-Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 99.99 1
JBO 1/4in x 32TPI UNEF No-Go Left Hand Thread Ring Gauge 2A UNEF - 500021 Premium German made UNEF Left Hand No-Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 149.99 1
JBO 1/4in x 20TPI UNJC No-Go Thread Ring Gauge 3A UNJC - 544019 Premium German made UNJC Right Hand No-Go Thread Ring Gauge. For checking to a 3A tolerance. GBP 159.99 1
JBO 1/4in x 28TPI UNF No-Go Thread Ring Gauge 3A UNF (Unified Fine) - 501131 Premium German made UNF Right Hand No-Go Thread Ring Gauge. For checking to a 3A tolerance. GBP 101.99 1
JBO 1/4in x 20TPI UNC No-Go Thread Ring Gauge 3A UNC (Unified Coarse) - 501081 Premium German made UNC Right Hand No-Go Thread Ring Gauge. For checking to a 3A tolerance. GBP 101.99 1
JBO 1/4in x 28TPI UNJF No-Go Thread Ring Gauge 3A UNJF - 500125 Premium German made UNJF Right Hand No-Go Thread Ring Gauge. For checking to a 3A tolerance. GBP 133.99 1
JBO 1/4in x 28TPI UNJF Go/No-Go Thread Plug Gauge 3B UNJF - 511609 Premium German made UNJF Right Hand Go/No-Go Thread Plug Gauge. For checking to a 3B tolerance. GBP 149.99 1
JBO 1/4in x 32TPI UNEF Go/No-Go Left Hand Thread Plug Gauge 2B UNEF - 516900 Premium German made UNEF Left Hand Go/No-Go Thread Plug Gauge. For checking to a 2B tolerance. GBP 149.99 1
JBO 1/4in x 36TPI UN Go/No-Go Thread Plug Gauge 2B UN (Unified) - 512599 Premium German made UN Right Hand Go/No-Go Thread Plug Gauge. For checking to a 2B tolerance. GBP 299.99 1
JBO 1/4in x 20TPI UNC Go/No-Go Thread Plug Gauge 2B UNC (Unified Coarse) - 512403 Premium German made UNC Right Hand Go/No-Go Thread Plug Gauge. For checking to a 2B tolerance. GBP 69.99 1
JBO 1/4in x 20TPI UNC Go/No-Go Left Hand Thread Plug Gauge 2B UNC (Unified Coarse) - 512405 Premium German made UNC Left Hand Go/No-Go Thread Plug Gauge. For checking to a 2B tolerance. GBP 123.99 1
JBO 1/4in x 20TPI Sti UNC Go/No-Go Thread Plug Gauge 2B Sti UNC (Unified Coarse) - 512700 Premium German made STI UNC Right Hand Go/No-Go Thread Plug Gauge. For checking to a 2B tolerance. GBP 179.99 1
JBO 1/4in x 19TPI BSP (g) Go/No-Go DLC Coated Thread Plug Gauge BSP (g) (British Standard Pipe) - 512726 Premium German made BSP (G) Right Hand Go/No-Go Thread Plug Gauge. These come with a DLC coating for longer tool life. GBP 169.99 1