73181500 under HS Code SCREWS, BOLTS, NUTS, COACH-SCREWS, SCREW HOOKS, RIVETS, COTTERS, COTTER-PINS, WASHERS (INCLUDING SPRING WASHERS) AND SIMILAR ARTICLES, OF IRON OR STEEL - THREADED ARTICLES : OTHER SCREWS AND BOLTS, WHETHER OR NOT WITH THEIR NUTS OR WASHERS, 73181110 under HS Code SCREWS, BOLTS, NUTS, COACH-SCREWS, SCREW HOOKS, RIVETS, COTTERS, COTTER-PINS, WASHERS (INCLUDING SPRING WASHERS) AND SIMILAR ARTICLES, OF IRON OR STEEL - THREADED ARTICLES : COACH SCREWS : MACHINE SCREWS, and 84099113 under HS Code PARTS SUITABLE FOR USE SOLELY OR PRINCIPALLY WITH THE ENGINES OF HEADING 8407 OR 8408 - OTHER : 8409 91 - SUITABLE FOR USE SOLELY OR PRINCIPALLY WITH SPARK IGNITION INTERNAL COMBUSTION PISTON ENGINES: VALVES, INLET AND EXHAUST, PISTON, PISTON RINGS, PISTON ASSEMBLIES : PISTON RINGS. were the top exported HS Codes by NAMO NARAYAN INDUSTRIES in 2023.