{"product_id":"gibraltar-z9281-structural-flat-washer-1-1-4-in-alloy-steel","title":"Gibraltar Z9281 Structural Flat Washer 1-1\/4 in Alloy Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe GIBRALTAR Z9281 is a structural flat washer designed for heavy-duty fastening applications requiring load distribution and corrosion resistance. Built from alloy steel with a zinc yellow dichromate finish, this washer meets the demands of structural bolted connections in construction, fabrication, and mechanical assembly work. It is sized for a 1-1\/4 inch screw, with a 1-3\/8 inch inside diameter, 2-1\/2 inch outside diameter, and a 1\/4 inch thickness. The Rockwell C43-C49 hardness rating makes it suitable for high-load structural joints where a standard washer would not hold up. Installers across structural steel, heavy equipment, and industrial maintenance trades will find this washer fits standard specification work.\u003c\/p\u003e\n\u003cp\u003eThis washer is used in structural bolting applications across residential, commercial, and industrial projects. Typical use cases include steel beam connections, anchor bolt assemblies, heavy machinery mounting, and infrastructure fastening where bearing surface area and material hardness are critical. The zinc yellow dichromate finish provides a corrosion-inhibiting layer suited for indoor and sheltered outdoor environments. It is sold individually and is appropriate wherever a 1-1\/4 inch structural flat washer is specified per project or fabrication requirements.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eAlloy steel construction with Rockwell C43-C49 hardness for structural-grade load bearing\u003c\/li\u003e\n  \u003cli\u003eZinc yellow dichromate finish for corrosion resistance in demanding environments\u003c\/li\u003e\n  \u003cli\u003e1-3\/8 inch inside diameter fits 1-1\/4 inch screw or bolt assemblies\u003c\/li\u003e\n  \u003cli\u003e2-1\/2 inch outside diameter provides broad bearing surface for load distribution\u003c\/li\u003e\n  \u003cli\u003e1\/4 inch thickness supports high-clamp-load structural connections\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 an OEM-style structural flat washer for use with 1-1\/4 inch fasteners in structural bolting assemblies per applicable project specifications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by structural iron workers, millwrights, or general contractors following applicable building codes and bolt specification standards. Always ensure the mating fastener and nut are rated for the same structural class before assembly. Torque fasteners using calibrated tooling in accordance with the project engineer or specification sheet. Do not substitute this washer in applications requiring a different hardness class or dimensional standard without engineering review.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWasher Type\u003c\/strong\u003e: Structural Flat\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Alloy Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Zinc Yellow Dichromate\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eScrew Size\u003c\/strong\u003e: 1-1\/4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 1.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 2.500 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.250 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness\u003c\/strong\u003e: Rockwell C43-C49\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Inch\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: Z9281\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GIBRALTAR","offers":[{"title":"Default Title","offer_id":51697820270898,"sku":"Z9281","price":17.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/fa90eb20c2a5b0caa30214d16f696503.jpg?v=1788354612","url":"https:\/\/voomisupply.com\/products\/gibraltar-z9281-structural-flat-washer-1-1-4-in-alloy-steel","provider":"Voomi Supply","version":"1.0","type":"link"}