{"product_id":"imscrews-1-2-13-x-4-heavy-duty-structural-carriage-bolts-304-stainless-steel-18-8-full-thread-anchor-bolts-for-4x4-posts-beams-5-pcs","title":"IMSCREWS 1\/2-13 x 4 Heavy-Duty Structural Carriage Bolts, 304 Stainless Steel (18-8), Full Thread Anchor Bolts for 4x4 Posts \u0026 Beams, 5 PCS","description":"\u003cp\u003e\u003cstrong\u003eIMSCREWS 1\/2\"-13 x 4\" Heavy-Duty 304 Stainless Steel Carriage Bolts (5 PCS)\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSubstantial Support for Structural Post Connections\u003c\/strong\u003e\u003cbr\u003eThe IMSCREWS 1\/2\" x 4\" carriage bolt is engineered for heavy-duty structural projects requiring maximum shear resistance and deep penetration. With a robust 1\/2-inch diameter and a 4-inch length, these bolts are the \u003cstrong\u003eideal\u003c\/strong\u003e choice for securing standard 4x4 timber posts (actual 3.5\"). They provide the necessary reach to penetrate the wood while leaving 0.5\" of thread to accommodate washers and nuts for a \u003cstrong\u003esnug\u003c\/strong\u003e, permanent connection. Built for durability, they offer the stability required for outdoor structures, deck framing, and landscape timber projects.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eHigh Durability and Safety-Focused Design\u003c\/strong\u003e\u003cbr\u003eForged from premium 18-8 (304) stainless steel, these fasteners are highly resistant to rust and corrosion in coastal or humid environments. The smooth round head offers a \u003cstrong\u003eclean\u003c\/strong\u003e appearance that reduces snagging hazards, making them a safe choice for railings, play sets, and benches. The integrated square neck prevents the bolt from spinning, allowing for easy, one-sided installation with a single wrench from the nut side.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003e- Thread Size: 1\/2\"-13 Coarse (UNC); Length: 4\" (Under Head)\u003cbr\u003e- Material: 304 (18-8) Stainless Steel; Full Thread\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003ePro-Tips:\u003c\/strong\u003e\u003cbr\u003e1. Use a 1\/2\" drill bit to ensure a \u003cstrong\u003esnug\u003c\/strong\u003e, structural fit for the square neck.\u003cbr\u003e2. Pair with stainless steel flat washers and hex nuts on the nut side to distribute load and protect wood fibers.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMassive Load-Bearing Diameter: The robust 1\/2-inch shank provides industry-leading shear strength and structural integrity, specifically designed for heavy-duty timber framing and anchoring.\u003c\/li\u003e\n\u003cli\u003eFull 4-Inch Deep Reach: Well-suited for through-bolting standard 4x4 structural posts or joining multiple heavy beam layers, ensuring a safe, rock-solid connection that smaller bolts can't match.\u003c\/li\u003e\n\u003cli\u003eMarine-Grade 304 Stainless: Forged from premium 18-8 (304) stainless steel for maximum defense against saltwater air and corrosive ACQ pressure-treated lumber in outdoor foundations.\u003c\/li\u003e\n\u003cli\u003eHigh-Torque Self-Locking Neck: The heavy-duty square shoulder bites deep into the wood, locking the bolt firmly in place to allow for high-tension tightening from the nut side alone.\u003c\/li\u003e\n\u003cli\u003eTamper-Resistant Safety Dome: The smooth round head provides a professional snag-free finish while preventing unauthorized removal¡ªessential for public docks, parks, and large outdoor structures.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eASIN:\u003c\/strong\u003e B0F2F9GV8Z\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal SKU:\u003c\/strong\u003e IMS0905\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 1\/2\"-13 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 Round\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":57034062725286,"sku":"B0F2F9GV8Z","price":13.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0271\/2784\/0903\/files\/51ZaVl7AlSL_de18d66e-98d5-483e-9953-0904add07975.jpg?v=1787034959","url":"https:\/\/www.imscrews.com\/products\/imscrews-1-2-13-x-4-heavy-duty-structural-carriage-bolts-304-stainless-steel-18-8-full-thread-anchor-bolts-for-4x4-posts-beams-5-pcs","provider":"IMSCREWS","version":"1.0","type":"link"}