KNURLED SCREWS RUBBER-METAL PARTS PARTS WITH AN INSIDE THREAD SCREWS WITH SQUARE HEADS. RECTANGULAR PARTS WITH MACHINING OR SECONDARY OPERATIONS RIVETS, PINS, BOLTS KNURLED SCREWS WELD SCREWS THREADED SCREWS FOR WOOD, PLASTIC, PLATE SCREWS WITH WASHER INCORPORATED PARTS WITH SLOTS/GROOVES ETC PARTS IN STAINLESS STEEL, BRASS, COPPER SPECIAL PARTS AND VARIOUS SCREWS KNURLED SCREWS Knurled screws as per the needs of the customer.