7318SCREWS, BOLTS, NUTS, COACH-SCREWS, SCREW HOOKS, RIVETS, COTTERS, COTTER-PINS, WASHERS (INCLUDING SPRING WASHERS) AND SIMILAR ARTICLES, OF IRON OR STEEL
HSN heading 7318 falls under Chapter 73 — articles of iron or steel. It breaks down into 12 sub-codes listed below.
Sub-codes under 7318 (12)
731811
COACH SCREWS :
731812
OTHER WOOD SCREWS
731813
SCREW HOOKS AND SCREW RINGS
731814
SELF-TAPPING SCREWS
731815
OTHER SCREWS AND BOLTS, WHETHER OR NOT WITH THEIR NUTS OR WASHERS
731816
NUTS
731819
OTHER
731821
SPRING WASHERS AND OTHER LOCK WASHERS
731822
OTHER WASHERS
731823
RIVETS
731824
COTTERS AND COTTER-PINS
731829
OTHER :
About HSN heading 7318
The 4-digit code 7318 is an HSN heading — a mid-level grouping that breaks down further into 6-digit sub-headings and 8-digit tariff items. Choose the most specific sub-code that matches your supply so the GST rate, e-invoice schema, and GSTR-1 HSN summary all line up correctly. It sits inside Chapter 73, which covers articles of iron or steel.