{"product_id":"imscrews-5-16-18-x-3-carriage-bolts-304-stainless-steel-18-8-full-thread-structural-fasteners-for-decks-4x4-posts-timber-construction-5-pcs","title":"IMSCREWS 5\/16-18 x 3 Carriage Bolts, 304 Stainless Steel (18-8), Full Thread Structural Fasteners for Decks, 4x4 Posts \u0026 Timber Construction, 5 PCS","description":"\u003cp\u003e\u003cstrong\u003eIMSCREWS 5\/16\"-18 x 3\" Heavy-Duty 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 5\/16\" x 3\" carriage bolt is engineered for structural projects requiring significant shear resistance and a professional finish. With a robust 5\/16-inch diameter and a precise 3-inch length, these bolts are the \u003cstrong\u003eideal\u003c\/strong\u003e choice for securing deck railings, fencing main-posts, and timber-to-timber connections. The full thread design ensures maximum versatility, providing a \u003cstrong\u003esnug\u003c\/strong\u003e and secure connection across various material combinations. Built for durability, they offer the stability required for long-term use in demanding residential and DIY applications.\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, low-profile appearance that reduces snagging hazards, making them a safe choice for playground equipment, park benches, and home decks. The integrated square neck prevents the bolt from spinning during installation, allowing for easy, one-sided fastening with a single wrench from the nut side.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003e- Thread Size: 5\/16\"-18 Coarse (UNC); Length: 3\" (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 5\/16\" 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 structural load and protect wood fibers.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHeavy-Duty 3 Reach: Precision-engineered to penetrate thick timber, such as standard 4x4 posts (3.5 actual) when countersunk, or joining two 2x4 boards with thick metal brackets.\u003c\/li\u003e\n\u003cli\u003eReinforced 5\/16 Diameter: The robust 5\/16-inch shank provides a 50% increase in cross-sectional strength over 1\/4 bolts, ensuring superior shear resistance for load-bearing joints.\u003c\/li\u003e\n\u003cli\u003eMarine-Grade 304 Stainless: Crafted from premium 18-8 (304) stainless steel for maximum rust prevention. Highly recommended for ACQ pressure-treated lumber and humid environments.\u003c\/li\u003e\n\u003cli\u003eSafety-First Aesthetic Finish: The smooth, drive-free domed head eliminates sharp edges and snagging, making it the premier choice for playground swings, slides, and garden benches.\u003c\/li\u003e\n\u003cli\u003eAnti-Spin Square Neck: The precision square shoulder locks firmly into wood fibers, allowing for easy, one-handed tightening of the nut from the opposite side.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eASIN:\u003c\/strong\u003e B0F2F5G54Q\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal SKU:\u003c\/strong\u003e IMS0807\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 5\/16\"-18 x 3\"\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":57034019242150,"sku":"B0F2F5G54Q","price":7.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0271\/2784\/0903\/files\/51ZaVl7AlSL_126489ee-2c53-41a9-b1b7-97543513dae6.jpg?v=1787034826","url":"https:\/\/www.imscrews.com\/ru\/products\/imscrews-5-16-18-x-3-carriage-bolts-304-stainless-steel-18-8-full-thread-structural-fasteners-for-decks-4x4-posts-timber-construction-5-pcs","provider":"IMSCREWS","version":"1.0","type":"link"}