{"product_id":"imscrews-1-4-20-x-3-1-4-long-carriage-bolts-304-stainless-steel-18-8-full-thread-precision-fasteners-for-thick-timber-play-sets-5-pcs","title":"IMSCREWS 1\/4-20 x 3-1\/4 Long Carriage Bolts, 304 Stainless Steel (18-8), Full Thread Precision Fasteners for Thick Timber \u0026 Play Sets, 5 PCS","description":"\u003cp\u003e\u003cstrong\u003eIMSCREWS 1\/4\"-20 x 3-1\/4\" Long 304 Stainless Steel Carriage Bolts (5 PCS)\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSubstantial Reach for Deep Structural Timber Connections\u003c\/strong\u003e\u003cbr\u003eThe IMSCREWS 1\/4\" x 3-1\/4\" carriage bolt is engineered for structural projects requiring reliable penetration through thick materials. With a standard 1\/4-inch diameter and an extended 3.25-inch length, these bolts are the \u003cstrong\u003eideal\u003c\/strong\u003e choice for securing dual-layered lumber (actual 3\") or fastening heavy hardware to thick garden beams. The full thread design ensures maximum flexibility, providing a \u003cstrong\u003esnug\u003c\/strong\u003e and secure connection regardless of the specific material combination. Built for long-term use, they offer the stability required for outdoor play sets, deck railings, and landscape timber 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 a safe choice for high-traffic residential areas and children's 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\u003e- Thread Size: 1\/4\"-20 Coarse (UNC); Length: 3-1\/4\" (Measured from 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 1\/4\" 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 hex 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\u003eExtended Reach for Deep Joining: The 3.25-inch length is specifically designed for through-bolting thick timber layers, such as double 2x4 beams, without the bulk of larger diameter bolts.\u003c\/li\u003e\n\u003cli\u003eFull Thread Maximum Grip: Featuring a precision-cut 1\/4-20 full thread, these bolts provide consistent clamping power across the entire 3-1\/4 span, ensuring a stable and gap-free connection.\u003c\/li\u003e\n\u003cli\u003eOutdoor-Ready 304 Stainless: Forged from 18-8 (304) stainless steel to endure rain, snow, and humidity. Highly compatible with ACQ pressure-treated lumber used in modern garden projects.\u003c\/li\u003e\n\u003cli\u003eSafety-First Aesthetic Finish: The smooth, snag-free domed head eliminates sharp edges, making it the top choice for family projects like playground swings, slides, and garden benches.\u003c\/li\u003e\n\u003cli\u003eSelf-Locking Square Neck: The precision square shoulder bites firmly into wood fibers, locking the bolt in place so you can easily tighten the nut with one hand from the opposite side.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eASIN:\u003c\/strong\u003e B0F2F2KPHG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal SKU:\u003c\/strong\u003e IMS0753\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 1\/4\"-20 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":57033975726246,"sku":"B0F2F2KPHG","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0271\/2784\/0903\/files\/51ZaVl7AlSL_3e0e8c9b-2a7c-4d7d-8ef2-c07205a81676.jpg?v=1787034759","url":"https:\/\/www.imscrews.com\/products\/imscrews-1-4-20-x-3-1-4-long-carriage-bolts-304-stainless-steel-18-8-full-thread-precision-fasteners-for-thick-timber-play-sets-5-pcs","provider":"IMSCREWS","version":"1.0","type":"link"}