{"product_id":"imscrews-3-8-16-x-4-1-2-carriage-bolts-304-stainless-steel-18-8-long-reach-structural-fasteners-10-pcs","title":"IMSCREWS 3\/8-16 x 4-1\/2 Carriage Bolts, 304 Stainless Steel (18-8), Long-Reach Structural Fasteners, 10 PCS","description":"\u003cp\u003e\u003cstrong\u003eIMSCREWS 3\/8\"-16 x 4-1\/2\" Heavy-Duty 304 Stainless Steel Carriage Bolts (10 PCS)\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSubstantial Strength for Thick Structural and Marine Construction\u003c\/strong\u003e\u003cbr\u003eThe IMSCREWS 3\/8\" x 4-1\/2\" carriage bolt is engineered for structural projects requiring deep penetration through thick materials. With a robust 3\/8-inch diameter and an extended 4.5-inch length, these bolts are the \u003cstrong\u003eideal\u003c\/strong\u003e choice for securing standard 4x4 timber posts (actual 3.5\" thickness) to additional structural beams or metal connectors. This length provides enough clearance to cross the post and a 1-inch board while leaving sufficient thread for heavy-duty washers and nuts to ensure a \u003cstrong\u003esnug\u003c\/strong\u003e, permanent connection. Built for longevity, they offer the structural stability required for outdoor pergolas, heavy-duty fencing, and residential deck framing.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSuperior Durability and Safety-Focused Design\u003c\/strong\u003e\u003cbr\u003eForged from premium 18-8 (304) stainless steel, these fasteners offer superior resistance to rust and corrosion, even when exposed to harsh coastal or humid environments. The smooth round head creates a \u003cstrong\u003eclean\u003c\/strong\u003e, tamper-resistant look that reduces snagging hazards, making them a safe choice for high-traffic areas like playground equipment, boardwalks, and residential 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\u003eThread Size: 3\/8\"-16 Coarse (UNC); Length: 4-1\/2\" (Measured from Under Head); 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 304 SS flat washers and hex nuts to distribute heavy structural loads and protect wood fibers.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eExtended 4.5 Reach: Designed for deep penetration through standard 4x4 posts (3.5 actual) with additional space for heavy-duty brackets or double lumber.\u003c\/li\u003e\n\u003cli\u003eStructural 3\/8 Shank: The 3\/8-inch diameter provides high shear resistance for load-bearing joints in deck framing and outdoor timber structures.\u003c\/li\u003e\n\u003cli\u003eCorrosion-Resistant 304 SS: Forged from 18-8 (304) stainless steel, offering high durability in humid environments and with treated lumber.\u003c\/li\u003e\n\u003cli\u003eSmooth Safety Head: The rounded, drive-free head minimizes snagging hazards, providing a clean finish for benches, railings, and play sets.\u003c\/li\u003e\n\u003cli\u003eSelf-Locking Square Neck: The precision square shoulder bites into wood to prevent spinning, enabling efficient one-sided installation from the nut side.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eASIN:\u003c\/strong\u003e B0F2F6VQF6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal SKU:\u003c\/strong\u003e IMS0866\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 3\/8\"-16 x 4-1\/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 10\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IMSCREWS","offers":[{"title":"Default Title","offer_id":57034025664678,"sku":"B0F2F6VQF6","price":20.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0271\/2784\/0903\/files\/51ZaVl7AlSL_353f977a-367b-43a7-9906-3925032ef968.jpg?v=1787034912","url":"https:\/\/www.imscrews.com\/ru\/products\/imscrews-3-8-16-x-4-1-2-carriage-bolts-304-stainless-steel-18-8-long-reach-structural-fasteners-10-pcs","provider":"IMSCREWS","version":"1.0","type":"link"}