{"product_id":"tool-flo-554004lac3a-threading-insert-4-tpi-flo-lock","title":"Tool-flo 554004LAC3A Threading Insert 4 Tpi Flo-lock","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe TOOL-FLO 554004LAC3A is a carbide threading insert designed for precision thread cutting in both internal and external applications. Built to the Acme thread standard at 4 threads per inch (TPI), this left-hand insert is finished with a Physical Vapor Deposition (PVD) coating process that improves surface hardness and wear resistance. The AC3A grade carbide substrate is suited for demanding threading operations where tool life and edge integrity are critical. Machinists and toolroom professionals install this insert into compatible Flo-Lock toolholders for consistent, repeatable thread form across production and repair work.\u003c\/p\u003e\u003cp\u003eThis insert is configured for left-hand Acme thread cutting and handles both internal and external thread profiles. It belongs to TOOL-FLO's Flo-Lock series, which is engineered for indexable threading applications. The FLA insert style designation indicates the specific geometry and seating configuration required. Typical applications include threading operations on lathes and CNC turning centers where Acme-profile threads are specified, such as lead screws, power screws, and actuator components.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAcme thread standard at 4 TPI for left-hand internal and external threading\u003c\/li\u003e\n\u003cli\u003eAC3A carbide grade with PVD coating for extended tool life\u003c\/li\u003e\n\u003cli\u003eFLA insert style geometry for use in Flo-Lock series toolholders\u003c\/li\u003e\n\u003cli\u003eTip-to-top height of 0.2020 inches for precise profile positioning\u003c\/li\u003e\n\u003cli\u003eCutting tip width of 0.0875 inches for accurate Acme thread form\u003c\/li\u003e\n\u003cli\u003eInsert thickness of 0.2550 inches for stable seating in the pocket\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with TOOL-FLO Flo-Lock series threading toolholders configured for the FLA insert style in size 4.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis insert is installed by a machinist or toolroom technician into a compatible Flo-Lock indexable threading toolholder. Power down and lock out the machine before changing inserts. Use the correct torque wrench or insert-seating tool as specified by the toolholder manufacturer to avoid cracking the carbide. Inspect the pocket and clamping screw for wear or debris before seating the new insert.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: FLA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: AC3A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: Acme\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Internal and External\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Left Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal Pitch\u003c\/strong\u003e: 4 TPI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: Flo-Lock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: PVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish Coating\u003c\/strong\u003e: Coated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Size\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTip to Top of Insert\u003c\/strong\u003e: 0.2020 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth of Cutting Tip\u003c\/strong\u003e: 0.0875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.2550 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23291804\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: TOOL-FLO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 554004LAC3A\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TOOL-FLO","offers":[{"title":"Default Title","offer_id":67907034874162,"sku":"554004LAC3A","price":60.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/74c1a1d129720dd214a587a8b8343493.jpg?v=1791173651","url":"https:\/\/voomisupply.com\/products\/tool-flo-554004lac3a-threading-insert-4-tpi-flo-lock","provider":"Voomi Supply","version":"1.0","type":"link"}