{"product_id":"century-drill-tool-5-16-in-x-3-3-4-in-l-cobalt-steel-stubby-drill-bit-straight-shank","title":"Century Drill \u0026 Tool 5\/16 in. X 3-3\/4 in. L Cobalt Steel Stubby Drill Bit Straight Shank","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Century Drill \u0026amp; Tool 5\/16 in. x 3-3\/4 in. L Cobalt Steel Stubby Drill Bit with a Straight Shank—a purpose-built tool engineered for metalworking where space is tight and demanding performance is non-negotiable. This polished cobalt steel bit is designed to punch clean, precise holes in hard metals while delivering lasting durability you can trust on every project.\u003c\/p\u003e \u003cp\u003eWhy this stubby drill bit stands out\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eStubby, high-rigidity design:\u003c\/strong\u003e With an overall length of 3-3\/4 in and a flute length of 2-1\/8 in, this bit minimizes deflection and chatter in cramped spaces. The reduced reach means steadier starts and straighter holes, even when you’re working inside engine bays, tool housings, or dense metal assemblies.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCobalt steel for tough metal drilling:\u003c\/strong\u003e Built for heat resistance and edge retention, this bit maintains sharpness longer when drilling hard alloys such as stainless steel and other hard metals, delivering consistent hole quality across multiple passes.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePolished finish for smoother cutting:\u003c\/strong\u003e A refined surface lowers friction and helps evacuate chips more efficiently, reducing clogging and heat buildup during extended drilling sessions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStraight shank for universal compatibility:\u003c\/strong\u003e Fits standard drill chucks with reliable bite and alignment, offering straightforward setup without special adapters.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCarded, single-piece packaging:\u003c\/strong\u003e Ready to inventory and easy to grab when you’re on the job, with no compromise on quality or integrity.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIdeal applications and use cases\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eDrilling hard metals in automotive repair, fabrication, and metalworking where space is at a premium—think engine blocks, brackets, and metal enclosures.\u003c\/li\u003e \u003cli\u003eCreating precise pilot holes in stainless steel, alloy steel, cast iron, and other tough materials where a standard bit would struggle or wander.\u003c\/li\u003e \u003cli\u003eSituations that demand a clean, accurate hole with minimal chatter, such as electrical panel work or machine shop assembly.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eHow to get the best results\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSpeed and feed:\u003c\/strong\u003e Match drilling speed to the material’s hardness; start moderate and adjust based on chip formation and temperature.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCooling and lubrication:\u003c\/strong\u003e Use light cutting fluid or oil when drilling metals to reduce heat and extend bit life.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePreparation tips:\u003c\/strong\u003e Center-punch the hole location for precise starting point, and drill a shallow pilot hole if needed to guide the bit in hard metals.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaintenance:\u003c\/strong\u003e Keep the flute clean of chips, inspect for dullness after heavy use, and avoid prolonged high-speed drilling without lubrication to prevent edge wear.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhat problems this bit helps you solve\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eDeflection and wandering in tight spaces that compromise hole accuracy.\u003c\/li\u003e \u003clirapid wear when drilling hard alloys with conventional high-speed steel bits.\u003e \u003cli\u003eFrustration from chips packing and excessive heat during drilling in confined areas.\u003c\/li\u003e\n\u003c\/lirapid\u003e\n\u003c\/ul\u003e \u003cp\u003eSpecifications at a glance\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Century Drill \u0026amp; Tool\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStyle:\u003c\/strong\u003e Stubby\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Cobalt steel\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Polished\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eShank Type:\u003c\/strong\u003e Straight Shank\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDrill Size:\u003c\/strong\u003e 5\/16 in\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOverall Length:\u003c\/strong\u003e 3-3\/4 in\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFlute Length:\u003c\/strong\u003e 2-1\/8 in\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Carded\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhether you’re outfitting a professional workshop or stocking up for DIY metal projects, this cobalt steel stubby bit from Century Drill \u0026amp; Tool offers a reliable balance of rigidity, heat resistance, and practicality. It’s a move beyond standard bits for anyone drilling hard metals in tight spaces, delivering precise results with every hole.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Century Drill \u0026 Tool","offers":[{"title":"Default Title","offer_id":52270063681810,"sku":"2767499","price":17.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0928\/1024\/8466\/files\/2767499_A.eps_High.jpg?v=1778696042","url":"https:\/\/nationalhardwaregroup.com\/products\/century-drill-tool-5-16-in-x-3-3-4-in-l-cobalt-steel-stubby-drill-bit-straight-shank","provider":"National Hardware Group","version":"1.0","type":"link"}