{"product_id":"imscrews-5-16-18-x-3-carriage-bolts-304-stainless-steel-18-8-round-head-square-neck-full-thread-pack-of-10","title":"IMSCREWS 5\/16-18 x 3 Carriage Bolts, 304 Stainless Steel 18-8, Round Head \u0026 Square Neck, Full Thread, Pack of 10","description":"\u003cp\u003e\u003cstrong\u003eIMSCREWS 5\/16\"-18 x 3\" Heavy-Duty 304 Stainless Steel Carriage Bolts (10 PCS)\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSubstantial Support for Structural Timber Connections\u003c\/strong\u003e\u003cbr\u003eThe IMSCREWS 5\/16\" x 3\" carriage bolt is engineered for projects requiring reliable shear resistance and stable structural support. With a robust 5\/16-inch diameter and a 3-inch length, these bolts are well-suited for high-load joints where stability is critical, such as joining two layers of standard dimensional lumber (2x4 or 2x6) or reinforcing deck frames. Built for durability, they offer the stability necessary for long-term use in outdoor structures, garden furniture, and residential DIY 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 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: 5\/16\"-18 Coarse; Length: 3\" (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 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\u003eSelf-Locking Square Neck: Features a precision-engineered square neck beneath the head that bites into wood, preventing the bolt from spinning while the nut is tightened for easy, one-sided installation.\u003c\/li\u003e\n\u003cli\u003eFull Thread Maximum Grip: The fully threaded 3-inch shank provides maximum grip and enhanced fastening power along its entire length, making it ideal for deep timber and structural projects.\u003c\/li\u003e\n\u003cli\u003e304 Marine Grade Stainless: Forged from premium 18-8 (304) Stainless Steel for superior corrosion defense. Essential for docks, coastal decks, and ACQ pressure-treated lumber.\u003c\/li\u003e\n\u003cli\u003eHeavy-Duty Structural Strength: The 5\/16 diameter delivers professional-grade shear resistance. At 3 long, these bolts are Well-suited for through-bolting thick posts and heavy framing.\u003c\/li\u003e\n\u003cli\u003eSnag-Free Aesthetic Finish: The smooth, domed round head provides a professional finish without sharp edges, ensuring safety for playground equipment, fencing, and furniture.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eASIN:\u003c\/strong\u003e B0F2F58VCG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal SKU:\u003c\/strong\u003e IMS0808\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 10\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IMSCREWS","offers":[{"title":"Default Title","offer_id":57034019340454,"sku":"B0F2F58VCG","price":8.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0271\/2784\/0903\/files\/51ZaVl7AlSL_195daee9-a090-4ec3-b070-e3856033cf35.jpg?v=1787034827","url":"https:\/\/www.imscrews.com\/products\/imscrews-5-16-18-x-3-carriage-bolts-304-stainless-steel-18-8-round-head-square-neck-full-thread-pack-of-10","provider":"IMSCREWS","version":"1.0","type":"link"}