{"product_id":"imscrews-3-8-x-4-hex-head-lag-screws-304-stainless-steel-partially-threaded-structural-wood-bolts-for-heavy-timber-5-pcs","title":"IMSCREWS 3\/8  x 4  Hex Head Lag Screws, 304 Stainless Steel, Partially Threaded Structural Wood Bolts for Heavy Timber, 5   pcs","description":"\u003cp\u003e\"\u003cstrong\u003eIMSCREWS 3\/8 x 4 Heavy-Duty Lag Bolts - 304 Stainless Steel (5 pcs)\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eElite Strength for Massive Structural Timber\u003c\/strong\u003e\u003cbr\u003eWhen projects demand extra-deep penetration and unyielding shear resistance, these 3\/8 diameter x 4 bolts deliver. Engineered for heavy timber framing, securing large gate posts, and mounting structural steel to 6x6 beams. The 4-inch length provides maximum stability for the thickest load-bearing wood members.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eVise-Like Clamping with Partial Threading\u003c\/strong\u003e\u003cbr\u003eOur \u003cstrong\u003epartially threaded shank\u003c\/strong\u003e is critical for long fasteners. It allows the bolt to spin freely in the outer board while the deep threads bite into the support post. This draws the timber members together into a gap-free joint, eliminating the bridging effect where thick boards remain loose—a common failure in extra-long full-thread screws.\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. It prevents chemical corrosion and eliminates 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 4 length?\u003c\/strong\u003e Optimized for passing through 2 or 2.5 thick timber with a deep 1.5 + thread anchor in the base post.\u003cbr\u003e\u003cstrong\u003e¡ñ Resilience:\u003c\/strong\u003e Rated for marine, coastal, and high-humidity outdoor use.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003e- Size: 3\/8 x 4 \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: 5 pcs\"\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eELITE CLAMPING POWER  The partially threaded design ensures the smooth shank passes through the outer member, pulling heavy timber pieces together with immense force for a gap-free joint.\u003c\/li\u003e\n\u003cli\u003eINDUSTRIAL STRUCTURAL HOLD  The robust 3\/8-inch diameter and 4-inch length provide elite shear resistance for heavy-duty framing, 4x4 posts, and deck main beams.\u003c\/li\u003e\n\u003cli\u003e304 EXTERIOR DEFENSE  Forged from premium 304 (18-8) stainless steel to prevent rust and staining in cedar, redwood, or ACQ pressure-treated lumber projects.\u003c\/li\u003e\n\u003cli\u003eSTABLE TORQUE DRIVE  Features a precision hex head for 9\/16  power sockets, providing stable torque transfer for controlled, slip-free seating in dense timber cores.\u003c\/li\u003e\n\u003cli\u003eTECHNICAL SPECIFICATION  To prevent splitting from this robust 3\/8  bolt, pre-drilling a pilot hole (1\/4  for softwoods, 9\/32  for hardwoods) is mandatory for structural safety.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eASIN:\u003c\/strong\u003e B0F21C32N8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal SKU:\u003c\/strong\u003e IMS0679\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 3\/8\" x 4\"\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 5\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IMSCREWS","offers":[{"title":"Default Title","offer_id":57034567516326,"sku":"B0F21C32N8","price":8.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0271\/2784\/0903\/files\/5127F26r8IL_d4cef4e2-9e21-402a-a74a-1b3f1a94085a.jpg?v=1787035665","url":"https:\/\/www.imscrews.com\/ru\/products\/imscrews-3-8-x-4-hex-head-lag-screws-304-stainless-steel-partially-threaded-structural-wood-bolts-for-heavy-timber-5-pcs","provider":"IMSCREWS","version":"1.0","type":"link"}