I have 4 machine shop Bowman/Barnes metal boxes each box is full of various sizes and lengths of slotted machine screws flat, round head, fine, medium, coarse thread. These came from a machine shop that went out of business. NEVER have to buy machine screws again. There are probably well over 5000 pieces easy. these are heavy boxes weighing at aprox 30lbs ea. and they are full! All NEW machine screws. (No nuts, no washers.) I'll take $220.00 or all. (the boxes alone are probably worth 1/2 my asking price). Located in Turlock. Best to call or leave message I'll return your call.