Overview Reviews Product Description Available in HSS and carbon steel Various set configurations in UNC, UNF, BSW and BSF thread styles Clarkson Osborn Catalog Product Videos Custom Field Die range 1/4 - 1/2" BSF Product Reviews Write a Review Write a Review × Clarkson-Osborn 5Pc. 1/4 - 1/2" BSF Carbon Steel Hex Die Nut Set TA18811 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *