{"product_id":"imscrews-1-4-x-3-1-2-hex-head-lag-screws-304-stainless-steel-partially-threaded-structural-timber-bolts-20-pcs","title":"IMSCREWS 1\/4  x 3-1\/2  Hex Head Lag Screws, 304 Stainless Steel, Partially Threaded Structural Timber Bolts, 20   pcs","description":"\u003cp\u003e\"\u003cstrong\u003eIMSCREWS 1\/4 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 Projects\u003c\/strong\u003e\u003cbr\u003eOur 20-piece pro-pack is designed for large-scale framing and deep-core anchoring. These 3.5-inch bolts provide the necessary depth for securing heavy rails to 4x4 posts or joining multi-layered timber. The 1\/4 diameter ensures high shear resistance for safety-critical joints.\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 creates a gap-free, rock-solid joint, eliminating the bridging effect common in long full-thread screws for a professional-grade finish.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e304 Stainless Protection\u003c\/strong\u003e\u003cbr\u003ePremium 18-8 (304) stainless steel resists rust in humid or coastal environments. compatible with \u003cstrong\u003eACQ pressure-treated lumber\u003c\/strong\u003e. Prevents unsightly rust streaks on high-value cedar, redwood, or deck framing.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e¡ñ Tools:\u003c\/strong\u003e Fits a standard \u003cstrong\u003e7\/16 hex socket\u003c\/strong\u003e or wrench.\u003cbr\u003e\u003cstrong\u003e¡ñ Pre-drilling:\u003c\/strong\u003e Recommended. Use a 1\/8 bit for softwoods or 3\/16 for hardwoods to prevent splitting.\u003cbr\u003e\u003cstrong\u003e¡ñ Why 3.5 length?\u003c\/strong\u003e Perfect for passing through 1.5 or 2 timber with a deep 1.5 + thread anchor.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSpecs:\u003c\/strong\u003e\u003cbr\u003e- Size: 1\/4 x 3-1\/2 \u003cbr\u003e- Thread: Partially Threaded (Max Clamping)\u003cbr\u003e- Material: 304 Stainless Steel\u003cbr\u003e- Drive: 7\/16 Hex Head\u003cbr\u003e- Qty: 20 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 bypasses the outer board, pulling timber members together for a rock-solid, gap-free joint.\u003c\/li\u003e\n\u003cli\u003eIDEAL FOR 2x LUMBER At 3.5 inches long, these bolts provide the perfect structural depth for connecting 2x4 or 2x6 lumber to support posts without over-penetration.\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\u003eSTABLE TORQUE INTERFACE Precision hex head ensures a secure 7\/16  socket fit, offering stable torque transfer for controlled seating in dense timber cores.\u003c\/li\u003e\n\u003cli\u003eTECHNICAL SPECIFICATION To prevent splitting and protect the 1\/4  shaft, pre-drilling a pilot hole (3\/16  for softwoods, 7\/32  for hardwoods) is mandatory.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eASIN:\u003c\/strong\u003e B0F219V261\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal SKU:\u003c\/strong\u003e IMS0623\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 1\/4\" 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":57034501849254,"sku":"B0F219V261","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0271\/2784\/0903\/files\/41keW3A_9kL_78e010ee-f367-406a-ac35-ffb47b38e6a6.jpg?v=1787035590","url":"https:\/\/www.imscrews.com\/products\/imscrews-1-4-x-3-1-2-hex-head-lag-screws-304-stainless-steel-partially-threaded-structural-timber-bolts-20-pcs","provider":"IMSCREWS","version":"1.0","type":"link"}