{"product_id":"drill-rod-tool-steels-66821-o1-tool-steel-flat-stock","title":"Drill Rod Tool Steels 66821 O1 Tool Steel Flat Stock","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe DRILL ROD TOOL STEELS 66821 is an O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who require a reliable, machinable steel blank before heat treatment. Conforming to AISI Type O1 material specification, this flat stock measures 3\/16 inch thick, 2-1\/2 inches wide, and 36 inches long and weighs 4.84 pounds. Thickness tolerance is held to plus or minus 0.001 inches, giving precise stock removal calculations before final grinding. O1 tool steel is widely used for punches, dies, gauges, and cutting tools where good toughness and moderate wear resistance after hardening are required.\u003c\/p\u003e\u003cp\u003eThis flat stock is suited for job shops, tool-and-die operations, and maintenance-repair shops that machine blanks to near-net shape before oil-quench hardening. The 36-inch length provides enough material for multiple short blanks or a single long tool form. The consistent width and thickness tolerances make it compatible with surface grinder setups for final sizing after hardening and tempering. It is appropriate for both one-off tooling and short-run production blanks.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel  -  good machinability in the annealed state and reliable response to oil quench\u003c\/li\u003e\n\u003cli\u003eThickness tolerance of plus or minus 0.001 inches for tight stock allowance control\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of plus 0.005 inches, minus 0.000 inches\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.5 inches for full usable length on every bar\u003c\/li\u003e\n\u003cli\u003eSquareness held to 0.003 inches on edges and 0.004 inches per inch of thickness on ends\u003c\/li\u003e\n\u003cli\u003eSingle-piece minimum order quantity  -  no multi-bar commitment required\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard O1 tool steel flat stock blank suitable for toolmaking, die making, punch fabrication, and gauge construction applications requiring AISI Type O1 oil-hardening material.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eMachining and hardening of tool steel should be performed by qualified machinists or tool-and-die makers familiar with oil-quench heat treatment procedures. Always follow applicable shop safety protocols when cutting, grinding, or heat treating tool steel, including proper eye protection and ventilation. Allow the bar to reach a stable temperature before precision measuring after thermal operations. Consult the material manufacturer's heat treatment guidelines for proper austenitizing and tempering temperatures specific to AISI O1 before processing.\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: 2-1\/2 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: plus 0.005 inches, minus 0.000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: plus 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquareness\u003c\/strong\u003e: Edge 0.003 inches; End 0.004 inches per inch of thickness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 4.84 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: DRILL ROD TOOL STEELS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 66821\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DRILL ROD \u0026 TOOL STEELS","offers":[{"title":"Default Title","offer_id":52059745714482,"sku":"66821","price":126.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0bd010a1cae711f9686084786dbdb869_92606e7a-671e-4340-8fde-cf477acd3c97.jpg?v=1790040560","url":"https:\/\/voomisupply.com\/products\/drill-rod-tool-steels-66821-o1-tool-steel-flat-stock","provider":"Voomi Supply","version":"1.0","type":"link"}