{"product_id":"imscrews-5-16-18-x-1-1-4-carriage-bolts-304-18-8-stainless-steel-round-head-square-neck-full-thread-medium-duty-structural-bolts-5-pack","title":"IMSCREWS 5\/16-18 x 1-1\/4 Carriage Bolts, 304 18-8 Stainless Steel, Round Head \u0026 Square Neck, Full Thread Medium Duty Structural Bolts, 5 Pack","description":"\u003cp\u003e\u003cstrong\u003eIMSCREWS 5\/16\"-18 x 1-1\/4\" Heavy-Duty 304 Stainless Steel Carriage Bolts (5 PCS)\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eReliable Fastening for Medium-Duty Structural Connections\u003c\/strong\u003e\u003cbr\u003eThe IMSCREWS 5\/16\" x 1-1\/4\" carriage bolt is designed for projects requiring reliable shear resistance in a versatile medium-short size. With a robust 5\/16-inch diameter, these bolts are well-suited for load-bearing joints where stability is critical, such as assembling heavy furniture, mounting garden brackets, or joining 1-inch thick timber sections. Built for durability, they offer the stability necessary for long-term use in outdoor and indoor structures.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eHigh Durability and Safety-Focused Design\u003c\/strong\u003e\u003cbr\u003eForged from 18-8 (304) stainless steel, these fasteners are highly resistant to corrosion in humid environments and are compatible with pressure-treated lumber. 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: 1-1\/4\" (Under Head)\u003cbr\u003e- Material: 304 (18-8) Stainless Steel; Full Thread\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eFAQ:\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eQ: Drill bit size?\u003c\/strong\u003e A: A 5\/16\" bit provides a \u003cstrong\u003esnug\u003c\/strong\u003e, structural fit.\u003cbr\u003e\u003cstrong\u003eQ: Coastal safe?\u003c\/strong\u003e A: Yes, 304 SS offers high resistance to salt air corrosion.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003ePro-Tips:\u003c\/strong\u003e\u003cbr\u003e1. Ensure the square neck is fully seated in the pre-drilled hole for a secure, anti-spin installation.\u003cbr\u003e2. Pair with a flat washer on the nut side to distribute structural load and protect material surfaces.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePREMIUM 304 STAINLESS STEEL Crafted from high-quality 18-8 (304) stainless steel, these carriage bolts offer superior rust and corrosion protection. Ideal for long-term outdoor, coastal, and marine applications.\u003c\/li\u003e\n\u003cli\u003eINCREASED 5\/16 LOAD STRENGTH The robust 5\/16 inch diameter provides higher shear strength and load-bearing capacity than standard 1\/4 bolts. Well-suited for structural projects where stability is key.\u003c\/li\u003e\n\u003cli\u003eVERSATILE 1-1\/4 FULL THREAD Featuring a full thread design, these 1.25-inch bolts provide maximum flexibility for various material thicknesses. It ensures a secure fit whether joining wood-to-wood or metal-to-wood.\u003c\/li\u003e\n\u003cli\u003eSELF-LOCKING SQUARE NECK Features a precision square neck that bites into wood to prevent spinning. This allows for easy one-sided tightening, while the smooth round head ensures a safe, snag-free finish.\u003c\/li\u003e\n\u003cli\u003eSPECIFICATIONS \u0026amp; NOTE Package includes 5 pieces of 5\/16-18 x 1-1\/4 carriage bolts only. Nuts and washers are NOT included. We recommend pre-drilling a 5\/16 hole for a professional fit.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eASIN:\u003c\/strong\u003e B0F2F5ZM43\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal SKU:\u003c\/strong\u003e IMS0786\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 5\/16\"-18 x 1-1\/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":57034009903270,"sku":"B0F2F5ZM43","price":8.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0271\/2784\/0903\/files\/619oV1ogmEL_f51417e4-e731-4a49-925a-babbb15f1eb9.jpg?v=1787034801","url":"https:\/\/www.imscrews.com\/ru\/products\/imscrews-5-16-18-x-1-1-4-carriage-bolts-304-18-8-stainless-steel-round-head-square-neck-full-thread-medium-duty-structural-bolts-5-pack","provider":"IMSCREWS","version":"1.0","type":"link"}