Overview Product Description Material: Self Colour Steel (Black) Thread: BSF Type: Countersunk Slotted Machine Screws Thread size 1/2" - 16 tpi Product Videos Custom Field Product Reviews Write a Review Write a Review × 1/2" BSF Self Colour Steel Countersunk Allen Key Wrench Socket Head Sets Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *