When you need to fasten heavy lumber, build a workbench, or secure outdoor structures, a regular wood screw just won't cut it. These M10 x 10mm A2 stainless steel hex head lag bolts (official DIN571 standard) give you the holding power of a traditional lag screw with the corrosion resistance of marine-grade stainless. The sharp hex head drives easily with a wrench or socket, and the coarse wood thread bites deep into timber – no stripping, no shearing. Whether you're building a deck, hanging a gate, or assembling furniture, this 10-pack of metric lag bolts saves you a trip to the big box store.
🔩 Key Features of These A2 Stainless Steel Hex Lag Bolts
A2 (304) stainless steel construction – Excellent corrosion resistance, oxidation resistance, and heat tolerance. Perfect for indoor and outdoor wood applications where moisture or humidity is a concern.
DIN571 standard hex head design – The external hex drive accepts a standard wrench or socket (no Phillips stripping). High strength and high toughness mean these bolts won't deform under load.
M10 coarse thread for wood – Deep, sharp threads cut into softwood and hardwood alike, providing maximum grip. The flat head shape (under the hex) sits flush against the workpiece.
10-piece pack – just the right quantity – Not too many to collect dust, not too few for your project. Ideal for attaching hardware, building planter boxes, or repairing outdoor furniture.
Untreated natural stainless finish – No plating to chip or wear off. What you see is solid A2 stainless steel, so these lag bolts will look and perform the same years from now.
📐 Technical Specifications – DIN571 Lag Bolts
| Product Type |
Wood Screw (Lag Bolt / Lag Screw) |
| Standard |
DIN571 |
| Material |
A2 Stainless Steel (304 equivalent) |
| Finish |
Untreated / Natural stainless |
| Head Style |
Hex Head (External Hexagon) |
| Drive Style |
Hexagon – wrench or socket required |
| Screw Size |
M10 (10mm diameter) |
| Length |
10mm (threaded length, overall length matches) |
| Thread Type |
Coarse wood thread (partial? full thread typical for lag bolts) |
| Grade |
A2 |
| Quantity per Pack |
10 pieces |
| Packaging |
Plastic bag / carton |
| System of Measurement |
Metric (M10) |
❓ Frequently Asked Questions
Q: Can I use these M10 lag bolts in pressure-treated lumber?
A: Yes. A2 (304) stainless steel is highly resistant to the corrosive chemicals used in modern pressure-treated wood (ACQ, CA, etc.). Unlike ordinary zinc-coated screws, these hex head lag bolts won’t develop white rust or black staining over time.
Q: Do I need to pre-drill before driving these into wood?
A: For M10 lag bolts, we strongly recommend drilling a pilot hole – about 8mm or 5/16" – especially in hardwoods or near the edge of a board. Pre-drilling prevents splitting, reduces driving torque, and helps the hex head seat flush. For softwoods like pine, you might get away without pre-drilling, but it's still good practice.
Q: What tools do I need to install these hex head lag screws?
A: You’ll need a wrench, socket, or impact driver with a metric socket that fits the M10 hex head (typically 17mm across flats – but check your specific bolt; common hex size for M10 is 16mm or 17mm). A ratcheting wrench makes the job easier. Avoid using pliers or an adjustable wrench that might slip.
Q: What's the difference between a lag bolt and a regular wood screw?
A: Lag bolts (or lag screws) are much heavier-duty. They have a larger diameter, deeper threads, and a hex head that lets you apply serious torque with a wrench. Regular wood screws have smaller heads (Phillips or Torx) and are meant for light to medium fastening. Lag bolts are for structural connections – think deck ledgers, beam splices, or attaching heavy machinery feet to wood.
Q: Are these A2 stainless steel lag bolts suitable for outdoor use near saltwater?
A: A2 (304) stainless offers good corrosion resistance for most outdoor environments, including rain and humidity. For direct saltwater spray or constant immersion, A4 (316) stainless would be better. However, for typical backyard decks, fences, or garden structures away from the ocean, these A2 hex lag bolts will hold up for many years without rust.