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Ever needed a single metric lag bolt in an odd size but didn't want to buy a bulk box? These A2 stainless steel hex head lag bolts are sold in flexible quantities — 1, 2, 5, 10, or 20 pieces — so you get exactly what your project calls for, no more, no less. Whether you're fastening a workbench leg, hanging a heavy shelf bracket, or repairing outdoor furniture, these self-tapping wood screws drive cleanly into timber with a standard hex wrench or socket.
Made from A2 (304) stainless steel, each bolt resists rust, oxidation, and corrosion — a reliable choice for both indoor and outdoor applications. Available in four thread diameters (M6, M8, M10, M12) and lengths from 30mm to 150mm (approximately 1-3/16" to 5-7/8"), with a coarse wood thread and sharp point that bites aggressively into softwood and hardwood alike.
Ideal for furniture assembly, deck repairs, timber framing, garden structures, machinery mounting, and any DIY project where you need a precise quantity of a specific metric lag bolt size.
Replace a single broken lag bolt, mount a shelf bracket, or fix a gate hinge — buy exactly the size you need without committing to a bulk pack.
Assemble workbenches, cabinets, and timber frames with the right diameter and length for each joint — M6 for lighter connections, M12 for heavy structural loads.
Fasten deck boards, pergola beams, fence posts, and garden shed framing with A2 stainless that resists rain, humidity, and outdoor weathering.
Stock specific sizes for on-site repairs without carrying full bulk boxes. Order 5 or 10 of a particular size to keep your kit lean and organized.
| Product Type | Hex Head Lag Bolt / Self-Tapping Wood Screw |
|---|---|
| Material | A2 Stainless Steel (304 equivalent) |
| Finish | Natural stainless (no plating or coating) |
| Head Style | Hexagon (external hex) |
| Drive Style | Hex socket or wrench (user-supplied) |
| Thread Type | Coarse, self-tapping wood thread with sharp point |
| Available Thread Diameters | M6, M8, M10, M12 |
| Available Lengths | M6: 30–80mm | M8: 30–120mm | M10: 50–130mm | M12: 60–150mm |
| Pack Options | 1, 2, 5, 10, 20 pieces (select from variant options) |
| System | Metric |
| Application | Softwood, hardwood, timber framing, furniture, outdoor structures |
| Length Measurement | From under the head to the tip (head height not included) |
For M6 and M8 in softwood, the sharp tip often allows self-tapping without a pilot hole. For M10 and M12, or any size in hardwood (oak, maple, teak), always pre-drill with a bit approximately 70–80% of the bolt's core diameter. This prevents splitting and makes driving significantly easier. A pilot hole also ensures the bolt follows a straight path.
You need a hex socket or open-end wrench matching the head size. Typical hex head sizes: M6 ≈ 10mm, M8 ≈ 13mm, M10 ≈ 16mm, M12 ≈ 18mm (verify against your specific bolt as tolerances vary). A ratcheting wrench or impact driver with a socket makes driving faster and easier, especially for longer bolts.
Yes. A2 (304) stainless offers good resistance to rain, humidity, and mild salt spray, making it suitable for decks, fences, garden sheds, and outdoor furniture. For direct saltwater immersion or extreme marine environments (docks, marinas), A4 (316) stainless is the better choice. For most general outdoor applications, these 304 hex lag bolts will significantly outlast regular steel or zinc-coated fasteners.
Many projects need just one or two specific sizes — replacing a broken lag bolt, mounting a new bracket, or repairing a single joint. Buying a bulk pack of 50 or 100 leaves you with leftover fasteners you may never use. With 1, 2, 5, 10, or 20-piece options, you pay only for what you need and can mix different diameters and lengths in a single order.
Yes — the sharp point and coarse wood thread cut into timber as you drive them. However, "self-tapping" doesn't mean a pilot hole is never needed. For best results and to avoid splitting, a pilot hole is recommended for M10/M12 and for any size in hardwood. The bolt will then follow the pilot hole cleanly and seat flush without cracking the wood.
A general rule: the lag bolt should penetrate at least 1.5 times the thickness of the top material into the base timber. For example, if attaching a 20mm board to a post, select a length that gives you at least 30mm of thread engagement in the post. Length (L) is measured from under the head to the tip — the head height is not included in the stated length.
A2 (304) stainless is suitable for most indoor and outdoor applications including decks, furniture, and garden structures. A4 (316) stainless contains molybdenum, which provides significantly better resistance to chlorides and saltwater — making it the preferred choice for marine, coastal, and pool environments. If your project is near the ocean or in constant contact with salt water, choose A4 instead.
