Imperial
BSF Slotted Countersunk Head Machine Screw Grade-4.8 BS450
BSW Whitworth Pozi Countersunk Head Machine Screw Grade-4.8 BS450
BSW Whitworth Slotted Countersunk Head Machine Screw Grade-4.8 BS450
BSF Pozi Countersunk Head Machine Screw Grade-4.8 BS450
BA Pozi Countersunk Head Machine Screw Grade-4.8 BS57
BA Slotted Countersunk Head Machine Screw Grade-4.8 BS57