Overview Product Description Type - Socket cup point grub screws. Thread - BSF. Thread size - 1/4" - 26 tpi Grade - 12.9 High Tensile steel,none plated. Product Videos Custom Field Product Reviews Write a Review Write a Review × 1/4"-26 BSF SOCKET ALLEN GRUB SCREWS HT STEEL Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *