{"product_id":"starrett-54037-o1-tool-steel-flat-stock-5-32x3-5x18in","title":"Starrett 54037 O1 Tool Steel Flat Stock 5\/32x3.5x18in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54037 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, jig fabrication, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 5\/32 inches thick, 3-1\/2 inches wide, and 18 inches long, weighing 2.79 pounds. O1 tool steel offers excellent machinability in the annealed state and responds well to oil-quench hardening, making it a go-to material for punches, dies, gauges, and cutting tools. Thickness tolerance is held to plus or minus 0.001 inches, supporting tight-tolerance work straight from stock.\u003c\/p\u003e\u003cp\u003eThis flat stock is suited for machine shops, tool-and-die operations, and maintenance facilities requiring pre-sized tool steel ready for layout, machining, and heat treatment. The 18-inch length provides practical blank sizes for a wide range of tooling applications without excess material waste. Machinists, toolmakers, and die makers working in both job-shop and production environments commonly stock this profile for on-demand fabrication.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel for excellent machinability and hardening response\u003c\/li\u003e\n\u003cli\u003eThickness held to plus or minus 0.001 inches for precise stock removal planning\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.0000 to 0.0050 inches (minus 0 \/ minus 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: all edges held to 0.003 inches per inch\u003c\/li\u003e\n\u003cli\u003eSingle-piece packaging — no minimum bundle commitment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard O1 oil-hardening tool steel flat bar suitable for general toolmaking, die making, and precision fabrication applications requiring AISI Type O1 material specification.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eCutting, grinding, and machining of tool steel flat stock should be performed by qualified machinists or toolmakers using appropriate carbide or high-speed steel tooling. Always anneal or verify annealed condition before heavy machining. Heat treatment — including oil quenching and tempering — should follow established metallurgical procedures for AISI O1 tool steel and be performed by personnel familiar with proper hardening protocols. Use appropriate personal protective equipment when cutting or grinding.\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: 5\/32 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 3-1\/2 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: 0.0000 to minus 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\u003eEdge Squareness\u003c\/strong\u003e: 0.003 inches per inch (all edges)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.79 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 54037\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51540664058162,"sku":"54037","price":181.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_6b5fa8ad-27c1-4ebc-a180-a9dd40510003.jpg?v=1785861258","url":"https:\/\/voomisupply.com\/products\/starrett-54037-o1-tool-steel-flat-stock-5-32x3-5x18in","provider":"Voomi Supply","version":"1.0","type":"link"}