Key Takeaways
- HS 7318 Breakdown: Threaded articles (7318.11–7318.19: coach screws, wood screws, self-tapping screws, bolts, nuts) and non-threaded articles (7318.21–7318.29: spring washers, flat washers, rivets, cotters).
- Finished Fasteners vs. Wire Rod Raw Material: Finished fasteners under HS 7318 are distinct from cold-heading steel wire rods (HS 7213/7227), which require mandatory TISI steel permits.
- Import Duty & FTA Savings: Standard MFN duty on HS 7318 is typically 10%, reducible to 0% with a valid Form E, Form D, Form AK, or Form AJ Certificate of Origin.
1. Tariff Subheadings Under HS 73.18
Heading 73.18 covers threaded and non-threaded fasteners made of iron or steel (including stainless steel): 7318.14 self-tapping screws, 7318.15 other screws and bolts (whether or not with their nuts or washers), 7318.16 nuts, 7318.21 spring washers, 7318.22 other washers, and 7318.23 rivets.
2. TISI Scope Clarity & Valuation Documentation
While finished steel bolts and screws under HS 7318 do not require a mandatory TISI import license, customs officers frequently scrutinize declared unit prices per kilogram. Importers should clearly state material grades (e.g., SUS304/316 stainless steel vs. Grade 8.8/10.9 carbon steel), standards (DIN/JIS/ISO), and dimensions on the Commercial Invoice.
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Standard 10% MFN import duty on HS 7318 fasteners can be exempted to 0% when accompanied by a valid Form E (China), Form D (ASEAN), or Form AK (Korea).
Official Sources: Thai Customs Department (customs.go.th) and Thai Industrial Standards Institute (tisi.go.th).
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View TISI Scope Verification & Customs ServicesStandard iron or steel bolts, screws, nuts, and washers imported into Thailand fall under HS Heading 73.18 (e.g., 7318.15 for bolts/screws and 7318.16 for nuts). General industrial fasteners under HS 7318 are not subject to mandatory TISI licensing—unlike raw steel wire rods (HS 7213/7227) used to manufacture fasteners, which are strictly regulated by TISI.
Frequently Asked Questions
Q:Do imported bolts and screws under HS 7318 require a TISI license in Thailand?
A:Standard finished bolts, screws, and nuts under HS 7318 do not require a mandatory TISI import license, whereas raw steel wire rods (HS 7213/7227) used to manufacture fasteners are strictly regulated by TISI.
Q:What is the import duty on screws and bolts in Thailand?
A:The standard MFN tariff rate for HS 7318 is 10% plus 7% VAT. With a valid FTA Certificate of Origin such as Form E, import duty can be reduced to 0%.
Q:How should bolts imported together with nuts be classified?
A:Bolts imported with their corresponding nuts and washers in sets are classified under subheading 7318.15.
