{"product_id":"keo-919-000-251-countersink-set-5-pc-cobalt-steel","title":"Keo 919-000-251 Countersink Set 5 Pc Cobalt Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KEO 919-000-251 is a 5-piece cobalt steel countersink set designed for right-hand countersinking operations in metal, composite, and hard materials. The set covers a head diameter range of 5\/16 to 1 inch with a consistent 100-degree included angle across all five tools, making it suitable for a variety of standard fastener preparations. Shanks run straight and range from 1\/4 to 3\/8 inch in diameter. Each countersink carries a bright, uncoated finish and is manufactured from cobalt steel for added heat and wear resistance compared to standard high-speed steel tooling. A plastic storage case is included.\u003c\/p\u003e\u003cp\u003eThis set is suited for machine shops, maintenance facilities, and fabrication environments where multiple countersink sizes are needed in a single kit. Applications include deburring drilled holes and preparing seating surfaces for flat-head fasteners in ferrous and non-ferrous materials. The range of overall lengths, from 1-5\/8 to 2-5\/8 inches, accommodates use in standard drill chucks and drill press setups. Single-end construction keeps the tools straightforward to index and replace individually.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e5-piece set covering 5\/16 to 1 inch head diameter range\u003c\/li\u003e\n\u003cli\u003e100-degree included angle on all countersinks for standard flat-head fastener applications\u003c\/li\u003e\n\u003cli\u003eCobalt steel construction for improved heat resistance and tool life\u003c\/li\u003e\n\u003cli\u003eStraight shank, 1\/4 to 3\/8 inch diameter, compatible with standard drill chucks\u003c\/li\u003e\n\u003cli\u003eBright uncoated finish for clean performance across a range of workpiece materials\u003c\/li\u003e\n\u003cli\u003eIncludes plastic storage case to keep the set organized between uses\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose countersink set for use in drill presses, lathes, and hand-held drill drivers accepting straight-shank tooling in the 1\/4 to 3\/8 inch range.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThese countersinks are installed by machinists and tool-and-die professionals using standard drill chucks or collet-style holders. Secure the shank fully before operation and confirm the workpiece is clamped to prevent movement. Select the appropriate countersink size for the intended fastener head to achieve proper seating depth. Inspect cutting edges for wear before use on hard materials to avoid chatter or premature tool failure.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Pieces\u003c\/strong\u003e: 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Head Diameter\u003c\/strong\u003e: 5\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Head Diameter\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 100 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Cutting Diameter\u003c\/strong\u003e: 3\/32 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Cutting Diameter\u003c\/strong\u003e: 59\/64 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Shank Diameter\u003c\/strong\u003e: 1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Shank Diameter\u003c\/strong\u003e: 3\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Overall Length\u003c\/strong\u003e: 1-5\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Overall Length\u003c\/strong\u003e: 2-5\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Single\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage Unit\u003c\/strong\u003e: Plastic Case\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: KEO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 919-000-251\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KEO","offers":[{"title":"Default Title","offer_id":52125477732658,"sku":"919-000-251","price":175.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6a45e2ba8a96a564bf30753804a19b96.jpg?v=1790087640","url":"https:\/\/voomisupply.com\/products\/keo-919-000-251-countersink-set-5-pc-cobalt-steel","provider":"Voomi Supply","version":"1.0","type":"link"}