Stainless Lock Nuts 4BA £2.07/10. e mail lostignition8@gmail.com for full list of BA screws in Steel, Brass and Stainless. Socket screws in steel and stainless. Hexagon Head screws, countersunk head screws, cheese and Round head screws. Taper Pins in Steel and stainless. Split Pins in Steel and stainless.