{"product_id":"imscrews-3-8-x-3-1-2-hex-head-lag-screws-304-stainless-steel-18-8-partially-threaded-pack-of-2-heavy-duty-wood-screws","title":"IMSCREWS 3\/8  x 3-1\/2  Hex Head Lag Screws, 304 Stainless Steel 18-8, Partially Threaded, Pack of 2 - Heavy Duty Wood Screws","description":"\u003cp\u003e\"\u003cstrong\u003eIMSCREWS 3\/8 x 3-1\/2 Heavy-Duty Lag Screws - 304 Stainless Steel (2 pcs)\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eExtreme Strength for Heavy Timber Joints\u003c\/strong\u003e\u003cbr\u003eWhen 1\/4 or 5\/16 fasteners aren't enough for structural safety, these 3\/8 diameter bolts deliver industrial-grade stability. Perfect for securing large deck ledgers, heavy gate posts, or structural brackets to 4x4 or 6x6 beams. The 3.5-inch length ensures deep-core anchoring for load-bearing wood members.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eVise-Like Clamping Power\u003c\/strong\u003e\u003cbr\u003eOur \u003cstrong\u003epartially threaded shank\u003c\/strong\u003e features a smooth upper section that allows the bolt to spin freely in the outer board. This draws the timber members together into a gap-free, rock-solid joint, eliminating the bridging effect common in long full-thread screws. Ideal for pulling heavy lumber into tight, professional alignment.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e304 Stainless Exterior Defense\u003c\/strong\u003e\u003cbr\u003eForged from premium 18-8 (304) Stainless Steel for ultimate weather resistance. compatible with \u003cstrong\u003eACQ pressure-treated lumber\u003c\/strong\u003e, preventing structural decay and unsightly rust streaks on high-value cedar, redwood, or deck framing.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eTechnical FAQ\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003e¡ñ Tools Required:\u003c\/strong\u003e Fits a standard \u003cstrong\u003e9\/16 hex socket\u003c\/strong\u003e or wrench.\u003cbr\u003e\u003cstrong\u003e¡ñ Pre-drilling:\u003c\/strong\u003e Mandatory for this diameter. Use a 1\/4 bit for softwoods or 9\/32 bit for hardwoods to prevent splitting.\u003cbr\u003e\u003cstrong\u003e¡ñ Why 3.5 length?\u003c\/strong\u003e Optimized for passing through 1.5 or 2 timber with a strong 1.5 + thread anchor in the support post.\u003cbr\u003e\u003cstrong\u003e¡ñ Resilience:\u003c\/strong\u003e Rated for marine, coastal, and high-humidity environments.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003e- Size: 3\/8 x 3-1\/2 \u003cbr\u003e- Thread: Partially Threaded (Max Clamping)\u003cbr\u003e- Material: 304 Stainless Steel (18-8)\u003cbr\u003e- Drive: 9\/16 Hex Head\u003cbr\u003e- Qty: 2 pcs\"\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMedium-Duty Structural Strength: The 3\/8  diameter provides reliable shear resistance for various wood construction projects. At 3.5 inches long, these screws are ideal for attaching 2x lumber to structural posts or headers.\u003c\/li\u003e\n\u003cli\u003e304 Stainless Steel: Made from premium 18-8 (304) Stainless Steel, providing effective protection against rust and corrosion. Compatible with ACQ pressure-treated lumber in outdoor or humid environments.\u003c\/li\u003e\n\u003cli\u003ePartial Thread Clamping: The partially threaded shank allows the bolt to pull the outer board flush against the support structure, reducing gaps between surfaces for a more secure connection.\u003c\/li\u003e\n\u003cli\u003eOutdoor Durability: These fasteners help maintain the appearance of premium wood like cedar and redwood by reducing the likelihood of rust streaks common with zinc-plated hardware.\u003c\/li\u003e\n\u003cli\u003eProfessional Installation: Use with a standard 9\/16  hex socket. To prevent wood splitting, pre-drilling a pilot hole (recommended 1\/4  for softwoods or 5\/16  for hardwoods) is required.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eASIN:\u003c\/strong\u003e B0F21B6R7B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal SKU:\u003c\/strong\u003e IMS0675\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 3\/8\" x 3-1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Style:\u003c\/strong\u003e Hex\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 2\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IMSCREWS","offers":[{"title":"Default Title","offer_id":57034559717542,"sku":"B0F21B6R7B","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0271\/2784\/0903\/files\/41keW3A_9kL_49f68184-d1dd-41a7-8cd8-6b65f79f65e8.jpg?v=1787035654","url":"https:\/\/www.imscrews.com\/products\/imscrews-3-8-x-3-1-2-hex-head-lag-screws-304-stainless-steel-18-8-partially-threaded-pack-of-2-heavy-duty-wood-screws","provider":"IMSCREWS","version":"1.0","type":"link"}