{"product_id":"imscrews-3-8-16-x-5-1-2-structural-carriage-bolts-304-stainless-steel-18-8-full-thread-extra-long-coach-bolts-for-6x6-posts-girders-5-pcs","title":"IMSCREWS 3\/8-16 x 5-1\/2 Structural Carriage Bolts, 304 Stainless Steel (18-8), Full Thread Extra-Long Coach Bolts for 6x6 Posts \u0026 Girders, 5 PCS","description":"\u003cp\u003e\u003cstrong\u003eIMSCREWS 3\/8\"-16 x 5-1\/2\" Extra-Long 304 Stainless Steel Carriage Bolts (5 PCS)\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSubstantial Strength for Heavy Structural Timber Connections\u003c\/strong\u003e\u003cbr\u003eThe IMSCREWS 3\/8\" x 5-1\/2\" carriage bolt is engineered for heavy-duty structural projects requiring maximum shear resistance and deep penetration. With a robust 3\/8-inch diameter and an extended 5.5-inch length, these bolts are well-suited for high-load joints where stability is critical, such as through-bolting multi-layered girders or securing heavy-duty hardware to thick 6x6 timber posts. Built for durability, they offer the stability necessary for long-term use in outdoor structures, garden gazebos, and industrial woodworking 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 an \u003cstrong\u003eideal\u003c\/strong\u003e choice for visible railings, play sets, and heavy-duty 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: 3\/8\"-16 Coarse (UNC); Length: 5-1\/2\" (Measured from 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 3\/8\" 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 nuts on the nut side to distribute structural load and protect wood fibers.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eExtreme Reach for Heavy Framing: The massive 5.5-inch length is custom-engineered for through-bolting oversized 6x6 posts and multi-layer structural girders, providing deep-seated stability.\u003c\/li\u003e\n\u003cli\u003eFull-Thread Clamping Power: Unlike partial threads, our full-thread design ensures consistent tension and maximum pull-out resistance across the entire 5.5 span of the joint.\u003c\/li\u003e\n\u003cli\u003eMarine-Grade 304 Stainless: Forged from premium 18-8 (304) stainless steel for ultimate rust protection in coastal environments and compatibility with corrosive ACQ treated wood.\u003c\/li\u003e\n\u003cli\u003eOne-Way Self-Locking Install: The precision-cut square neck bites deep into wood grain, locking the bolt so you can tighten the nut from the opposite side without a secondary wrench.\u003c\/li\u003e\n\u003cli\u003eSmooth Safety Head: The low-profile domed head eliminates sharp protrusions, providing a professional finish that is safe for high-traffic decks, docks, and public structures.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eASIN:\u003c\/strong\u003e B0F2F6GJ5X\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal SKU:\u003c\/strong\u003e IMS0872\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 3\/8\"-16 x 5-1\/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 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":57034026221734,"sku":"B0F2F6GJ5X","price":12.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0271\/2784\/0903\/files\/51ZaVl7AlSL_eae15c59-b270-43e2-b0cf-caf091274c2f.jpg?v=1787034915","url":"https:\/\/www.imscrews.com\/ru\/products\/imscrews-3-8-16-x-5-1-2-structural-carriage-bolts-304-stainless-steel-18-8-full-thread-extra-long-coach-bolts-for-6x6-posts-girders-5-pcs","provider":"IMSCREWS","version":"1.0","type":"link"}