{"product_id":"gibraltar-z9201u-flat-washer-5-16-in-steel-black-oxide","title":"Gibraltar Z9201U Flat Washer 5\/16 in Steel Black Oxide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe GIBRALTAR Z9201U is a standard flat washer designed for use with 5\/16-inch screws and fasteners. Manufactured from steel with a black oxide finish, this washer distributes load across the fastener head or nut to reduce surface damage and prevent loosening under vibration. The black oxide coating provides moderate corrosion resistance and a consistent dark appearance. With an inside diameter of 0.344 inches, an outside diameter of 0.828 inches, and a thickness of 0.188 inches, the Z9201U meets standard dimensional tolerances for general mechanical and structural assembly work. It is installed by electricians, plumbers, HVAC technicians, and general tradespeople wherever a standard steel flat washer is required.\u003c\/p\u003e\n\u003cp\u003eThis washer is suited for residential and light commercial fastening applications. It is commonly used in equipment mounting, panel assembly, ductwork attachment, pipe hangers, and general structural connections where a 5\/16-inch fastener is specified. The steel construction and black oxide finish make it appropriate for indoor and semi-protected environments. Sold individually, with a minimum order quantity of 5 units.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eStandard flat washer profile for 5\/16-inch screw size\u003c\/li\u003e\n  \u003cli\u003eSteel construction for reliable load distribution and durability\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish provides moderate corrosion resistance and a uniform dark appearance\u003c\/li\u003e\n  \u003cli\u003eInside diameter of 0.344 inches fits 5\/16-inch fastener shafts with standard clearance\u003c\/li\u003e\n  \u003cli\u003eOutside diameter of 0.828 inches and thickness of 0.188 inches meet standard washer dimensions\u003c\/li\u003e\n  \u003cli\u003eInch measurement system; UNSPSC Code 31161807\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard flat washer for use with 5\/16-inch screws and bolts in general mechanical, structural, and trade-service assembly applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall using standard hand tools; seat the washer flush against the mating surface before torquing the fastener. For electrical or mechanical enclosures, confirm the washer material and finish are appropriate for the environmental exposure rating of the installation. Always follow applicable codes and equipment manufacturer fastener specifications when selecting washers for structural or safety-critical connections.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWasher Type\u003c\/strong\u003e: Standard Flat\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eScrew Size\u003c\/strong\u003e: 5\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 11\/32 inches (0.3438 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 53\/64 inches (0.8281 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 3\/16 inches (0.1875 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Black Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161807\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: GIBRALTAR\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: Z9201U\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GIBRALTAR","offers":[{"title":"Default Title","offer_id":51699737493810,"sku":"Z9201U","price":52.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/551c3af5108b3dc455def012b4521a30.jpg?v=1788380081","url":"https:\/\/voomisupply.com\/products\/gibraltar-z9201u-flat-washer-5-16-in-steel-black-oxide","provider":"Voomi Supply","version":"1.0","type":"link"}