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Running out of fasteners mid-project is frustrating — especially when you're building a deck, fence, or outdoor structure that needs to last. These 70-pack 1/4-20 x 2" hex head lag bolts are built for DIYers and contractors who need reliable, corrosion-resistant fasteners without constant hardware store runs.
Each lag bolt is machined from 304 stainless steel with a 1/4" (6.35 mm) thread diameter, 2" (50.8 mm) overall length, and a 7/16" external hex drive. The partial-thread design features a smooth shank near the head that pulls two workpieces tightly together for a stronger mechanical bond.
Ideal for deck ledger boards, fence post attachments, playground equipment, gate hinges, and joining 2×4 lumber — anywhere you need structural holding power that won't rust, stain, or fail under load.
Attach ledger boards, secure fence posts, and fasten structural members with lag bolts that won't rust or loosen over time — even in wet climates.
Building a raised garden bed, pergola, or outdoor furniture? The 70-pack gives you plenty of fasteners to complete the job without running short.
304 stainless steel handles salt air and moisture far better than standard coated screws — ideal for docks, boat lifts, and beachside structures.
Keep a box on the truck for structural framing, playground equipment installation, and any job requiring a reliable 1/4-20 lag bolt in quantity.
| Product Type | Lag Bolts / Lag Screws |
|---|---|
| Material | 304 Stainless Steel |
| Head Style | Hex Head (External Hex) |
| Drive Size | 7/16" (wrench / socket not included) |
| Thread Size | 1/4"-20 (UNC) |
| Thread Diameter | 1/4 inch (6.35 mm) |
| Thread Pitch | 20 TPI |
| Overall Length | 2 inches (50.8 mm) |
| Thread Type | Partial thread (smooth shank near head) |
| Finish | Natural silver stainless |
| Quantity | 70 pieces per pack |
| Measurement System | Imperial (inch) |
Yes. 304 stainless steel resists the corrosive chemicals (ACQ, CA) in modern pressure-treated wood. Unlike zinc-coated lag screws, these won't prematurely rust or stain the wood surface.
Yes — pre-drilling is strongly recommended. Use a pilot hole approximately 3/16" in diameter (slightly smaller than the bolt's root diameter) to prevent wood splitting and make driving easier. A clearance hole in the top board helps the partial thread pull pieces together correctly.
You'll need a 7/16" hex socket, combination wrench, or nut driver. A cordless impact driver with a 7/16" socket makes installation significantly faster. The wrench is not included in this pack.
Lag bolts have a thicker shank and hex head designed for heavy-duty structural connections — deck ledgers, beam attachments, and framing. Regular wood screws are for lighter joinery. The partial thread on lag bolts pulls the top piece tight against the base material for a stronger mechanical joint.
304 stainless steel offers good salt-spray resistance for most residential coastal applications — docks, decks, and outdoor structures near the ocean. For constant immersion or extreme marine exposure, 316 stainless is recommended, but these 304 lag bolts will significantly outperform standard galvanized screws.
It depends on the deck size and ledger length, but a typical residential deck ledger connection typically requires one lag bolt every 16" on center. The 70-piece pack is generally sufficient for medium-sized deck ledger boards or multiple smaller structural connections.
