JBO 1 1/8in x 1/2 1/2 1/2 1/27TPI UNC Go Thread Ring Gauge 2A UNC (Unified Coarse) - 502401 Premium German made UNC Right Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 169.99 1
JBO No.4 x 40TPI UNC Go Left Hand Thread Ring Gauge 2A UNC (Unified Coarse) - 504041 Premium German made UNC Left Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 149.99 1
JBO 5/16in x 18TPI UNC Go Left Hand Thread Ring Gauge 2A UNC (Unified Coarse) - 502418 Premium German made UNC Left Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 109.99 1
JBO No. 6 x 40 UNJF Go Thread Ring Gauge 3B UNJF - 505347 Premium German Made UNJF Right Hand Go Thread Ring Gauge. For checking to a 3B tolerance GBP 169.99 1
JBO 5/8in x 11TPI UNC Go Thread Ring Gauge 2A UNC (Unified Coarse) - 502419 Premium German made UNC Right Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 89.99 1
JBO No.2 x 56TPI UNC Go Thread Ring Gauge 3A UNC (Unified Coarse) - 502385 Premium German made UNC Right Hand Go Thread Ring Gauge. For checking to a 3A tolerance. GBP 169.99 1
JBO No.4 x 48TPI UNF Go Left Hand Thread Ring Gauge 2A UNF (Unified Fine) - 506449 Premium German made UNF Left Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 169.99 1
JBO No.5 x 44TPI UNF Go Left Hand Thread Ring Gauge 2A UNF (Unified Fine) - 506452 Premium German made UNF Left Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 135.99 1
JBO No.5 x 40TPI UNC Go Left Hand Thread Ring Gauge 2A UNC (Unified Coarse) - 506403 Premium German made UNC Left Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 135.99 1
JBO No.1 x 72TPI UNF Go Thread Ring Gauge 2A UNF (Unified Fine) - 502428 Premium German made UNF Right Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 149.99 1
JBO 7/16in x 14TPI UNC Go Thread Ring Gauge 3A UNC (Unified Coarse) - 502422 Premium German made UNC Right Hand Go Thread Ring Gauge. For checking to a 3A tolerance. GBP 139.99 1
JBO 1/2in x 20TPI UNF Go Left Hand Thread Ring Gauge 2A UNF (Unified Fine) - 502457 Premium German made UNF Left Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 139.99 1
JBO No.8 x 36TPI UNF Go Thread Ring Gauge 3A UNF (Unified Fine) - 502447 Premium German made UNF Right Hand Go Thread Ring Gauge. For checking to a 3A tolerance. GBP 119.99 1
JBO 9/16in x 18TPI UNF Go Thread Ring Gauge 3A UNF (Unified Fine) - 502482 Premium German made UNF Right Hand Go Thread Ring Gauge. For checking to a 3A tolerance. GBP 151.99 1
JBO 7/8in x 1/2 1/2 1/2 1/29TPI UNC Go Thread Ring Gauge 2A UNC (Unified Coarse) - 502423 Premium German made UNC Right Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 129.99 1
JBO 11/16in x 24TPI UNEF Go Thread Ring Gauge 2A UNEF - 501316 Premium German made UNEF Right Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 159.99 1
JBO 5/8in x 18TPI UNF Go Thread Ring Gauge 3A UNF (Unified Fine) - 502473 Premium German made UNF Right Hand Go Thread Ring Gauge. For checking to a 3A tolerance. GBP 169.99 1
JBO 7/8in x 14TPI UNF Go Thread Ring Gauge 2A UNF (Unified Fine) - 502478 Premium German made UNF Right Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 164.99 1
JBO 9/16in x 24TPI UNEF Go Thread Ring Gauge 2A UNEF - 501334 Premium German made UNEF Right Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 139.99 1
JBO No.5 x 44TPI UNF Go Thread Ring Gauge 3A UNF (Unified Fine) - 502443 Premium German made UNF Right Hand Go Thread Ring Gauge. For checking to a 3A tolerance. GBP 135.99 1
JBO 3/4in x 16TPI UNF Go Thread Ring Gauge 2A UNF (Unified Fine) - 502461 Premium German made UNF Right Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 139.99 1
JBO 9/16in x 12TPI UNC Go Thread Ring Gauge 3A UNC (Unified Coarse) - 503165 Premium German made UNC Right Hand Go Thread Ring Gauge. For checking to a 3A tolerance. GBP 169.99 1
JBO No.6 x 40TPI UNF Go Thread Ring Gauge 2A UNF (Unified Fine) - 502444 Premium German made UNF Right Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 101.99 1
JBO No.10 x 32TPI UNF Go Thread Ring Gauge 3A UNF (Unified Fine) - 502431 Premium German made UNF Right Hand Go Thread Ring Gauge. For checking to a 3A tolerance. GBP 102.99 1
JBO 7/16in x 28TPI UNEF Go Thread Ring Gauge 2A UNEF - 501329 Premium German made UNEF Right Hand Go Thread Ring Gauge. For checking to a 2A tolerance. GBP 119.99 1