Overview Reviews Product Description BSF 1-3/8" 8 Go Thread Ring Gauge Dec. 1.3750" Frac. 1-3/8" TPI 8 Class Medium Description 1-3/8x8 BSF Go Thread Ring Member Standard BS84 & BS 919 Product Videos Custom Field Product Reviews Write a Review Write a Review × 1 3/8 x 8 BSF Go Thread Ring Member Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *