{"product_id":"imscrews-5-16-x-3-1-2-hex-head-lag-screws-304-stainless-steel-partially-threaded-heavy-duty-structural-framing-bolts-20-pcs","title":"IMSCREWS 5\/16  x 3-1\/2  Hex Head Lag Screws, 304 Stainless Steel, Partially Threaded Heavy-Duty Structural Framing Bolts, 20   pcs","description":"\"\u003cstrong\u003eIMSCREWS 5\/16 x 3-1\/2 Heavy-Duty Lag Screws - 304 Stainless Steel (20 pcs)\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eExtreme Reach for Structural Framing\u003c\/strong\u003e\u003cbr\u003eOur 20-piece pro-pack is designed for deep-core anchoring in heavy-duty projects. These 3.5-inch bolts provide the necessary penetration for securing thick timber rails to 4x4 or 6x6 posts. The 5\/16 diameter offers professional-grade shear resistance for safety-critical outdoor structures.\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 pulls the outer board tightly against the support beam. This clamping effect creates a gap-free, rock-solid joint, eliminating the bridging effect common in extra-long full-thread screws for a professional-grade finish.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e304 Stainless Weather Protection\u003c\/strong\u003e\u003cbr\u003eForged from premium 18-8 (304) stainless steel for superior rust resistance. compatible with \u003cstrong\u003eACQ pressure-treated lumber\u003c\/strong\u003e. Prevents unsightly rust streaks on high-value cedar, redwood, or premium deck framing even in humid or coastal environments.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003e¡ñ Tools:\u003c\/strong\u003e Fits a standard \u003cstrong\u003e1\/2 hex socket\u003c\/strong\u003e or wrench.\u003cbr\u003e\u003cstrong\u003e¡ñ Pre-drilling:\u003c\/strong\u003e Mandatory for this length. Use a 3\/16 bit for softwoods or 7\/32 bit for hardwoods to prevent timber splitting.\u003cbr\u003e\u003cstrong\u003e¡ñ Why 20 pcs?\u003c\/strong\u003e The ideal bulk quantity for consistent, multi-point structural installations such as full deck railing systems or retaining walls.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSpecs:\u003c\/strong\u003e\u003cbr\u003e- Size: 5\/16 x 3-1\/2 \u003cbr\u003e- Thread: Partially Threaded (Max Clamping)\u003cbr\u003e- Material: 304 Stainless Steel\u003cbr\u003e- Drive: 1\/2 Hex Head\u003cbr\u003e- Qty: 20 pcs\"\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eENGINEERED CLAMPING POWER Features a partial thread that allows the smooth shank to bypass the outer member, pulling thick timber together for a gap-free, rock-solid joint.\u003c\/li\u003e\n\u003cli\u003eDEEP-ANCHOR STABILITY The 3.5-inch length is optimized for securing 2x lumber (1.5  thick) to structural posts, providing elite withdrawal resistance with 2  of deep-core thread engagement.\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.\u003c\/li\u003e\n\u003cli\u003eHIGH-TORQUE DRIVE Precision hex head ensuring a secure 1\/2  socket fit, providing stable torque transfer for controlled seating in dense structural timber.\u003c\/li\u003e\n\u003cli\u003eTECHNICAL SPECIFICATION To prevent splitting and protect the 5\/16  shaft, pre-drilling a pilot hole (7\/32  for softwoods, 1\/4  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 B0F2195FPF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal SKU:\u003c\/strong\u003e IMS0647\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 5\/16\" 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 20\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IMSCREWS","offers":[{"title":"Default Title","offer_id":57034531668134,"sku":"B0F2195FPF","price":16.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0271\/2784\/0903\/files\/41keW3A_9kL_1174254d-27c8-457e-aeb4-2460be14dc89.jpg?v=1787035623","url":"https:\/\/www.imscrews.com\/ru\/products\/imscrews-5-16-x-3-1-2-hex-head-lag-screws-304-stainless-steel-partially-threaded-heavy-duty-structural-framing-bolts-20-pcs","provider":"IMSCREWS","version":"1.0","type":"link"}