{"product_id":"starrett-54043-o1-tool-steel-flat-stock-3-16x1-2x18-in","title":"Starrett 54043 O1 Tool Steel Flat Stock 3\/16x1\/2x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54043 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, punches, and precision machining applications. Manufactured to AISI Type O1 specifications, this flat stock measures 3\/16 inches thick, 1\/2 inch wide, and 18 inches long. Thickness tolerance is held to plus or minus 0.001 inches, giving machinists a consistent starting dimension before heat treatment. At 0.48 pounds per piece, this stock is a practical size for small tooling components. Licensed machinists, toolmakers, and die makers are the primary installers and users of this material.\u003c\/p\u003e\u003cp\u003eO1 tool steel flat stock is commonly used in job shops, tool and die operations, and maintenance machining environments. It is supplied in the annealed condition, ready for machining prior to oil-quench hardening. Typical applications include blanks for punches, form tools, scrapers, and cutting blades. The 18-inch length is well suited to bench work and small machine setups. Squareness is held to an edge tolerance of 0.003 inches per inch across all edges, supporting accurate layout and fitment.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel construction for consistent heat-treat response\u003c\/li\u003e\n\u003cli\u003eThickness held to plus or minus 0.001 inches for precise pre-grind stock allowance\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.000 to minus 0.005 inches — stock runs at or under nominal\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.250 inches, providing extra material for facing or cutoff\u003c\/li\u003e\n\u003cli\u003eSquareness held to 0.003 inches per inch on all edges for accurate layout\u003c\/li\u003e\n\u003cli\u003eAnnealed condition — machines freely before oil-quench hardening\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose O1 tool steel flat bar for machining, toolmaking, and die-making applications where oil-hardening tool steel stock is specified.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eO1 tool steel flat stock is machined, ground, and finished by qualified machinists or toolmakers prior to heat treatment. All grinding and cutting operations should be completed before hardening. When hardening, follow standard oil-quench procedures appropriate for AISI O1 tool steel and use proper PPE and fire controls. Consult material safety data for handling ground or machined steel swarf.\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: 1\/2 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\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 minus 0.005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: plus 0.250 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquareness\u003c\/strong\u003e: Edge — all 0.003 inches per inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.48 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: 54043\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51539336692018,"sku":"54043","price":69.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_b2b9eaa3-d9e7-4bd9-ad9a-74fe2ab7f678.jpg?v=1785838512","url":"https:\/\/voomisupply.com\/products\/starrett-54043-o1-tool-steel-flat-stock-3-16x1-2x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}