{"product_id":"starrett-54042-o1-tool-steel-flat-stock-3-16-x-3-16-x-18-in","title":"Starrett 54042 O1 Tool Steel Flat Stock 3\/16 X 3\/16 X 18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54042 is an O1 oil-hardening tool steel flat stock bar sized at 3\/16 inches thick by 3\/16 inches wide by 18 inches long. Manufactured to AISI Type O1 specification, this flat stock is used by machinists, toolmakers, and die makers who need a precision-ground blank ready for layout, grinding, and heat treatment. The thickness tolerance is held to plus or minus 0.001 inches, and the width tolerance runs from 0.000 to 0.005 inches, making it suitable for close-tolerance tooling applications. At 0.18 pounds, it is lightweight and easy to handle on the bench or at a surface grinder.\u003c\/p\u003e\u003cp\u003eO1 tool steel flat stock is a standard material in job shops, maintenance departments, and tooling rooms. This bar is appropriate for fabricating punches, dies, cutting tools, gauges, and general-purpose tooling where oil-quench hardening is required. The 18-inch length provides practical stock for single-piece tooling or can be cut down to shorter lengths as the application demands. Edge squareness is held to 0.003 inches per inch across all edges, supporting accurate layout and grinding work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel for consistent hardening response in oil quench\u003c\/li\u003e\n\u003cli\u003eThickness tolerance of plus or minus 0.001 inches for close-tolerance tooling blanks\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.000 to 0.005 inches\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.250 inches, minus 0 inches\u003c\/li\u003e\n\u003cli\u003eEdge squareness held to 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003eCompact 0.18-pound weight supports easy bench handling and setup\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard O1 oil-hardening tool steel flat stock blank for use in toolmaking, die making, and general machining applications requiring AISI Type O1 material specification.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eCutting, grinding, and heat treating of tool steel flat stock is typically performed by qualified machinists or toolmakers using appropriate metalworking equipment. Always wear proper personal protective equipment when cutting or grinding tool steel. Follow established shop practices and material safety data sheet guidance when handling tool steel and quench oils. Heat treatment should follow AISI O1 recommended preheat, hardening, and tempering temperature cycles using calibrated equipment.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Tool Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Specification\u003c\/strong\u003e: AISI Type O1 Oil Hardening\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 3\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 3\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 18 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness Tolerance\u003c\/strong\u003e: plus or minus 0.001 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Tolerance\u003c\/strong\u003e: 0.000 to 0.005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: plus 0.250 inches, minus 0 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquareness\u003c\/strong\u003e: 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.18 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31231200\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: STARRETT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 54042\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51542479372594,"sku":"54042","price":84.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_574e901b-3abc-4ed9-8512-69e2618218a0.jpg?v=1785901420","url":"https:\/\/voomisupply.com\/products\/starrett-54042-o1-tool-steel-flat-stock-3-16-x-3-16-x-18-in","provider":"Voomi Supply","version":"1.0","type":"link"}