Key specifications
| Standard | DIN 571 hexagon head wood screw |
|---|---|
| Sizes | 6, 8, 10 and 12 mm; other diameters quoted on request |
| Materials | Carbon steel; stainless A2 or A4 |
| Finishes | Zinc plated, hot-dip galvanized, plain stainless |
| Thread | Coarse wood thread with a gimlet point |
Made to order in China and shipped FOB or CIF from Tianjin, Ningbo, Shanghai or Shenzhen. Sizes, grades and finishes outside this list can be quoted.
Dimension drawing
Head and wrench sizes
Reference values for common DIN 571 sizes. Confirm the length and thread length for your order.
| Size | Wrench size s (mm) | Head height k (mm) | Inquiry |
|---|---|---|---|
| 6 mm | 10 | 4 | Quote this size |
| 8 mm | 13 | 5.5 | Quote this size |
| 10 mm | 17 | 7 | Quote this size |
| 12 mm | 19 | 8 | Quote this size |
Choosing finish by environment
- Zinc plated: dry indoor timber work.
- Hot-dip galvanized: outdoor decks, fencing, farm buildings and construction timber.
- Stainless A4: coastal sites and treated timber where corrosion risk is higher.
Installation notes
Drill a clearance hole through the fixture and a smaller pilot hole in the timber, then drive the screw with a wrench. Size the pilot hole and the embedment to the timber species and the design load.
Packing, shipping and documents
| MOQ | 500 pcs per specification; mixed sizes can be combined on one order |
|---|---|
| Lead time | 10–15 days for stock items, 25–30 days for production orders, confirmed in the quotation |
| Export packing | Inner boxes or bags labelled by size, export cartons, then palletized and stretch-wrapped; buyer labels and barcodes on request |
| Shipping ports | Tianjin, Ningbo, Shanghai, Shenzhen |
| Incoterms | EXW, FOB, CFR, CIF, DAP, DDP on request |
| HS code reference | HS 7318.15 (other screws and bolts, with or without nuts) is the usual heading for hex bolts. Confirm the final code with your customs broker. |
| Certificate of origin | ACFTA Form E available on request for buyers in ASEAN countries such as Malaysia, Indonesia, Vietnam and the Philippines |
| Order documents | Commercial invoice, packing list and inspection records agreed in the quotation |
What to include in your RFQ
- Diameter × length, e.g. 10 × 100
- Standard: DIN 571 or ASME inch lag screw
- Material and finish
- Washers if required
- Quantity per size, packing and destination
Frequently asked questions
What is the difference between a lag screw and a coach screw?
They are the same type of product. Lag screw is the common US term; coach screw is the common UK and Australian term.
What wrench fits a 10 mm DIN 571 screw?
A 17 mm wrench. The head height is about 7 mm.
Do lag screws need a pilot hole?
Yes, in most timber. A pilot hole stops the wood splitting and lets the thread bite cleanly.
What is the MOQ for DIN 571 lag screws?
Reference MOQ is 500 pcs per specification. This product is made to order, so lead time and price are confirmed with each quotation. We reply to every RFQ within 2 working hours.
Sources for technical review