{"product_id":"starrett-54288-o1-tool-steel-flat-stock-3-32x5x36-in","title":"Starrett 54288 O1 Tool Steel Flat Stock 3\/32x5x36 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54288 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 3\/32 inch thick, 5 inches wide, and 36 inches long, with a finished weight of 4.74 pounds. Thickness tolerance is held to +\/- 0.001 inches, making it suitable for close-tolerance toolroom work where dimensional accuracy is critical before hardening. Machinists, tool and die makers, and metalworking shops use this material as a reliable pre-hardened or anneal-state stock for fabricating custom tooling.\u003c\/p\u003e\u003cp\u003eO1 tool steel flat stock is a standard choice for toolrooms producing punches, dies, blades, gauges, and fixtures. The 3\/32-inch thickness makes this particular bar appropriate for thin-section tooling components or spacers where precise flatness and edge squareness are required. Squareness across all edges is held to 0.003 inches per inch. This stock ships in a single 36-inch length and is suitable for bench or machine work prior to oil-quench hardening and tempering operations. Metalworking professionals performing in-house tool fabrication will find this a direct-use stock requiring minimal surface preparation.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel material specification\u003c\/li\u003e\n\u003cli\u003eThickness tolerance of +\/- 0.001 inches for close-tolerance toolroom work\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.000 to -0.005 inches\u003c\/li\u003e\n\u003cli\u003eLength tolerance of +0.015 inches\u003c\/li\u003e\n\u003cli\u003eEdge squareness held to 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003eReady for oil-quench hardening and tempering as-cut\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard AISI O1 oil-hardening tool steel flat bar suitable for general toolroom and die shop applications requiring pre-machined flat stock in a 3\/32 x 5 x 36 inch form factor.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eMachining and cutting of tool steel flat stock should be performed by qualified machinists or tool and die makers using appropriate metalworking equipment. Always follow proper lockout and machine guarding procedures before setup. Oil-quench hardening and tempering operations involve elevated temperatures and flammable quench media and should be performed by experienced personnel following applicable shop safety protocols. Do not attempt to flame-cut or weld O1 tool steel without consulting the material specification for preheat and post-heat requirements.\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\/32 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 5 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: +\/- 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: +0.015 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: 4.74 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: 54288\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51542304555314,"sku":"54288","price":380.85,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_899d0510-d9a8-4c64-b32e-fd197a13aeb3.jpg?v=1785897501","url":"https:\/\/voomisupply.com\/products\/starrett-54288-o1-tool-steel-flat-stock-3-32x5x36-in","provider":"Voomi Supply","version":"1.0","type":"link"}