{"product_id":"imscrews-5-16-18-x-3-1-4-carriage-bolts-5-pack-bolts-only-304-stainless-steel-round-head-square-neck-full-thread-bolt-for-wood-fence-deck-dock-construction","title":"IMSCREWS 5\/16\"-18 x 3-1\/4\" Carriage Bolts (5 Pack, Bolts Only), 304 Stainless Steel Round Head Square Neck Full Thread Bolt for Wood Fence, Deck, Dock Construction","description":"\u003cb\u003eProfessional Grade 304 Stainless Steel Carriage Bolts by IMSCREWS\u003c\/b\u003e\u003cbr\u003e\n\u003cbr\u003e\nWhen it comes to outdoor construction, reliability is non-negotiable. IMSCREWS 5\/16\"-18 x 3-1\/4\" Carriage Bolts are engineered for durability, providing a robust fastening solution for structural wood projects. Made from premium 18-8 (304) stainless steel, these bolts offer superior protection against rust and oxidation, making them the preferred choice for decks, docks, and coastal area construction.\u003cbr\u003e\n\u003cbr\u003e\n\u003cb\u003eProduct Technical Specifications:\u003c\/b\u003e\u003cbr\u003e\n- \u003cb\u003eSize:\u003c\/b\u003e 5\/16\"-18 x 3-1\/4 inch\u003cbr\u003e\n- \u003cb\u003eMaterial:\u003c\/b\u003e 18-8 (304) Stainless Steel\u003cbr\u003e\n- \u003cb\u003eHead Style:\u003c\/b\u003e Smooth Round Head\u003cbr\u003e\n- \u003cb\u003eDrive System:\u003c\/b\u003e Square Neck (Self-Locking in wood)\u003cbr\u003e\n- \u003cb\u003eThread Type:\u003c\/b\u003e Full Thread (Coarse)\u003cbr\u003e\n- \u003cb\u003eQuantity:\u003c\/b\u003e 5 Pieces per Pack (Bolts Only)\u003cbr\u003e\n\u003cbr\u003e\n\u003cb\u003eCommon Applications \u0026amp; Installation:\u003c\/b\u003e\u003cbr\u003e\nThese carriage bolts are ideal for connecting heavy timbers where a clean, finished look is required on the exterior side. The round, smooth head provides a tamper-resistant finish, while the square neck beneath the head bites into the wood to prevent spinning. Common uses include building garden fences, securing playground swing sets, constructing pergolas, and heavy-duty deck framing.\u003cbr\u003e\n\u003cbr\u003e\n\u003cb\u003eFrequently Asked Questions (Rufus Optimized):\u003c\/b\u003e\u003cbr\u003e\n- \u003cb\u003eQ: Are nuts and washers included with this pack?\u003c\/b\u003e\u003cbr\u003e\n\u003cb\u003eA:\u003c\/b\u003e No, this package includes 5 pieces of carriage bolts only. Nuts and washers must be purchased separately to match the 5\/16\"-18 thread size.\u003cbr\u003e\n\u003cbr\u003e\n- \u003cb\u003eQ: Can these bolts be used in pressure-treated lumber?\u003c\/b\u003e\u003cbr\u003e\n\u003cb\u003eA:\u003c\/b\u003e Yes. 304 Stainless Steel is highly recommended for use with pressure-treated wood as it resists the corrosive chemicals often found in treated timber, preventing \"bleeding\" and structural degradation.\u003cbr\u003e\n\u003cbr\u003e\n- \u003cb\u003eQ: Is 304 stainless steel rust-proof?\u003c\/b\u003e\u003cbr\u003e\n\u003cb\u003eA:\u003c\/b\u003e While 304 stainless steel is extremely rust-resistant and ideal for outdoor and high-moisture environments, for direct salt-water immersion (marine use), 316 grade is often preferred. However, 304 is the industry standard for most exterior residential and commercial projects.\u003cbr\u003e\n\u003cbr\u003e\n\u003cb\u003eChoose IMSCREWS for precision-engineered hardware that stands the test of time and weather.\u003c\/b\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBOLTS ONLY - 5 PIECES: High-quality 5\/16-18 x 3-1\/4 inch carriage bolts. Please note that nuts and washers are NOT included. Ideal for small DIY repairs, specific replacement needs, or projects where you already have matching hardware.\u003c\/li\u003e\n\u003cli\u003ePREMIUM 304 STAINLESS STEEL: Crafted from 18-8 (304) stainless steel, these bolts offer exceptional rust and corrosion resistance. Unlike galvanized steel, they are built to withstand harsh outdoor conditions, coastal air, and moisture.\u003c\/li\u003e\n\u003cli\u003eANTI-ROTATION SQUARE NECK: Designed with a standard square neck under the round head to grip into wood, preventing the bolt from rotating during installation. This ensures a secure, one-sided tightening process without needing a backup wrench.\u003c\/li\u003e\n\u003cli\u003eHEAVY-DUTY WOOD FASTENERS: The 3-1\/4\" length is specifically optimized for structural wood-to-wood connections, such as 4x4 posts, deck framing, fence panels, and playground equipment. Full thread design provides consistent grip strength.\u003c\/li\u003e\n\u003cli\u003ePRECISE SPECIFICATIONS: Thread Diameter: 5\/16\"; Thread Pitch: 18 TPI; Overall Length: 3-1\/4\" (measured from under the head). Includes 5 professional-grade fasteners per pack, securely packaged in a branded bag to ensure integrity during transit.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eASIN:\u003c\/strong\u003e B0F2F8F7CT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal SKU:\u003c\/strong\u003e IMS0810\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 5\/16\"-18 x 3-1\/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":57034019438758,"sku":"B0F2F8F7CT","price":12.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0271\/2784\/0903\/files\/51aUC8y2oYL_485f4301-e82d-479b-a346-302bfe7f49ec.jpg?v=1787034828","url":"https:\/\/www.imscrews.com\/products\/imscrews-5-16-18-x-3-1-4-carriage-bolts-5-pack-bolts-only-304-stainless-steel-round-head-square-neck-full-thread-bolt-for-wood-fence-deck-dock-construction","provider":"IMSCREWS","version":"1.0","type":"link"}