Overview Reviews Product Description BSF 3/8" - 20 Go Thread Ring Gauge Dec. .3750" Frac. 3/8" TPI 20 Class Medium Description 3/8 x 20 BSF Go Thread Ring Member Standard BS84 & BS 919 Product Videos Custom Field Product Reviews Write a Review Write a Review × 3/8 x 20 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 *