{"product_id":"starrett-58893-o1-tool-steel-flat-stock-1-4-x-5-8-x-36-in","title":"Starrett 58893 O1 Tool Steel Flat Stock 1\/4 X 5\/8 X 36 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 58893 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 0.25 inches thick, 0.625 inches wide, and 36 inches long, weighing 1.6 pounds. O1 tool steel is valued for its ability to hold a fine edge after hardening and its predictable dimensional behavior during heat treatment. Thickness tolerance is held to plus or minus 0.001 inches, making this stock suitable for applications that require tight dimensional control before and after machining.\u003c\/p\u003e\u003cp\u003eThis flat stock is intended for tool and die makers, machinists, and precision fabricators working in job shops, maintenance facilities, or production environments. It is commonly used to produce punches, dies, gauges, cutting tools, and form blocks. The 36-inch length allows single-piece layouts for most bench-scale tooling projects or can be cut to shorter blanks as needed. O1 grade is preferred when moderate toughness, good machinability in the annealed state, and oil-quench hardening are required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel — predictable hardening response with oil quench\u003c\/li\u003e\n\u003cli\u003eThickness held to plus or minus 0.001 inches for precise pre-hardening fitment\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.000 to minus 0.005 inches for consistent stock removal allowance\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.015 inches ensures full usable length\u003c\/li\u003e\n\u003cli\u003eSquareness: edge to edge held to 0.003 inches per inch of width\u003c\/li\u003e\n\u003cli\u003eAnnealed and ready to machine, grind, or cut prior to hardening\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 machining applications requiring AISI Type O1 material specification.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eCutting, grinding, and machining should be completed in the annealed state before heat treatment. Oil hardening and tempering operations should be performed by a qualified heat treater following established procedures for AISI O1 tool steel. Use appropriate personal protective equipment and ventilation when grinding or cutting tool steel. Handle edges carefully as ground flat stock edges can be sharp.\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: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 0.625 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 36 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 0.015 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquareness\u003c\/strong\u003e: Edge — 0.003 inches per inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.6 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: 58893\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51542789325106,"sku":"58893","price":135.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_754715bf-1f34-4b5e-bd98-9bdf278b231e.jpg?v=1785907512","url":"https:\/\/voomisupply.com\/products\/starrett-58893-o1-tool-steel-flat-stock-1-4-x-5-8-x-36-in","provider":"Voomi Supply","version":"1.0","type":"link"}