{"product_id":"imscrews-3-8-16-x-4-carriage-bolts-304-stainless-steel-18-8-extended-length-structural-fasteners-2-pcs","title":"IMSCREWS 3\/8-16 x 4 Carriage Bolts, 304 Stainless Steel (18-8), Extended Length Structural Fasteners, 2 PCS","description":"\u003cp\u003e\u003cstrong\u003eIMSCREWS 3\/8\"-16 x 4\" Heavy-Duty 304 Stainless Steel Carriage Bolts (2 PCS)\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSubstantial Strength for 4x4 Posts and Heavy Timber Construction\u003c\/strong\u003e\u003cbr\u003eThe IMSCREWS 3\/8\" x 4\" carriage bolt is engineered for structural projects requiring reliable penetration through thick materials. With a robust 3\/8-inch diameter and an extended 4-inch length, these bolts are the \u003cstrong\u003eideal\u003c\/strong\u003e choice for securing standard 4x4 timber posts (actual 3.5\"). They provide the necessary length to fully cross the post while leaving sufficient thread to accommodate heavy-duty washers and nuts for a \u003cstrong\u003esnug\u003c\/strong\u003e, permanent connection. Built for durability, they offer the structural stability required for outdoor pergolas, deck framing, and heavy timber construction.\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 residential areas and play equipment. 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\" (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\u003eExtra-Long 4 Reach: Specifically designed for through-bolting standard 4x4 posts (3.5 actual) or joining multiple thick timber beams with ease.\u003c\/li\u003e\n\u003cli\u003eReinforced 3\/8 Shank: The heavy-duty 3\/8-inch diameter offers industrial-grade shear strength for high-load structural joints in decks and pergolas.\u003c\/li\u003e\n\u003cli\u003eWeather-Resistant 304 SS: Forged from 18-8 (304) stainless steel, offering high resistance to rust in coastal air and with treated lumber.\u003c\/li\u003e\n\u003cli\u003eTamper-Proof Safety Head: The smooth, drive-free round head prevents snags on clothing and adds security to outdoor gates and play sets.\u003c\/li\u003e\n\u003cli\u003eZero-Waste 2-Pack: The Designed for quantity for specific structural repairs, post-to-beam upgrades, or replacing old, rusted long-reach hardware.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eASIN:\u003c\/strong\u003e B0F2F6R5DY\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal SKU:\u003c\/strong\u003e IMS0861\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 3\/8\"-16 x 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 2\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IMSCREWS","offers":[{"title":"Default Title","offer_id":57034024845478,"sku":"B0F2F6R5DY","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0271\/2784\/0903\/files\/51ZaVl7AlSL_6553a43a-8bc0-4444-82b4-67a3fe37f7d1.jpg?v=1787034903","url":"https:\/\/www.imscrews.com\/ru\/products\/imscrews-3-8-16-x-4-carriage-bolts-304-stainless-steel-18-8-extended-length-structural-fasteners-2-pcs","provider":"IMSCREWS","version":"1.0","type":"link"}