{"product_id":"national-mfg-n222-356-square-u-bolt-5-16x2x3-zinc-5-pack","title":"National Mfg N222-356 Square U-bolt 5\/16x2x3 Zinc 5-pack","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe NATIONAL MFG\/SPECTRUM BRANDS HHI N222-356 is a zinc-plated square U-bolt supplied in a 5-piece boxed pack. Each U-bolt measures 5\/16 inches in diameter with a 2-inch width and 3-inch leg length, and ships with plate and hex nuts already attached for straightforward installation. The square bend profile provides a flush, stable bearing surface against flat stock, making it well suited for clamping pipes, conduit, strut, or structural members to rectangular wood or metal substrates. Plumbers, pipefitters, electricians, and general contractors reach for this fastener when a round U-bolt would not seat properly against flat or square-section material.\u003c\/p\u003e\n\u003cp\u003eThis U-bolt is commonly used in light commercial and residential mechanical work where pipe runs, conduit bundles, or equipment supports must be anchored to wood framing, steel channel, or flat bar. The included plate and hex nuts allow the installer to complete the connection without sourcing additional hardware. The zinc coating provides basic corrosion resistance suitable for dry or mildly damp indoor environments. Each package contains 5 fasteners, making it practical for jobs requiring multiple attachment points along a run.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSquare bend profile seats flush against rectangular wood and metal surfaces\u003c\/li\u003e\n  \u003cli\u003ePlate and hex nuts included — no additional hardware required\u003c\/li\u003e\n  \u003cli\u003eZinc finish provides corrosion resistance for indoor and sheltered applications\u003c\/li\u003e\n  \u003cli\u003e5\/16 inch rod diameter for moderate clamping loads\u003c\/li\u003e\n  \u003cli\u003e5-piece pack supports multi-point installations\u003c\/li\u003e\n  \u003cli\u003eBoxed loose for easy handling and jobsite storage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for securing pipes, conduit, strut, or structural members to rectangular wood and metal objects where a square U-bolt profile is required.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by plumbers, pipefitters, or electricians as part of pipe or conduit support runs. Verify that the clamped material diameter or width falls within the U-bolt opening before tightening. Hand-snug the hex nuts evenly on both legs before final tightening to keep the plate square against the mounting surface. Follow applicable code requirements — such as IPC or NEC support spacing guidelines — for the pipe or conduit type being secured.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRod Diameter\u003c\/strong\u003e: 5\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Width\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLeg Length\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBend Style\u003c\/strong\u003e: Square\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Zinc\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncluded Hardware\u003c\/strong\u003e: Plate and hex nuts\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 5 pieces\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Weight\u003c\/strong\u003e: 0.81 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUnit of Measure\u003c\/strong\u003e: EA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: NATIONAL MFG\/SPECTRUM BRANDS HHI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: N222-356\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NATIONAL HARDWARE","offers":[{"title":"Default Title","offer_id":51560937914674,"sku":"N222-356","price":21.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8ce6e33608b8fa337d71792b46f9f8fd.jpg?v=1786459665","url":"https:\/\/voomisupply.com\/products\/national-mfg-n222-356-square-u-bolt-5-16x2x3-zinc-5-pack","provider":"Voomi Supply","version":"1.0","type":"link"}