{"product_id":"osg-1400130005-thread-forming-tap-5-16-18-unc-bottoming-tin","title":"Osg 1400130005 Thread Forming Tap 5\/16-18 Unc Bottoming Tin","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1400130005 is a thread forming tap in the HY-PRO NRT series, designed for cold-forming internal threads in blind holes without cutting or producing chips. Sized for 5\/16-18 UNC right-hand threads, this bottoming chamfer tap starts forming threads within 1 to 1.5 pitches of the bottom of the hole, maximizing usable thread depth in closed-end applications. The tap is constructed from cobalt high-speed steel and finished with a titanium nitride (TiN) coating to extend tool life and reduce friction during forming. It carries a Thread Limit of H6, making it appropriate for precision thread tolerance requirements. Licensed machinists, toolmakers, and CNC operators are the typical users.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for blind hole threading in a range of ferrous and non-ferrous materials. It is rated for use in alloy steel, carbon steel, die steel, hardened steel, stainless steel, and aluminum. The bottoming chamfer design makes it a direct choice when maximum thread engagement is required near the bottom of a drilled blind hole, a common demand in fixture work, die and mold repair, and structural component manufacturing. It is equally applicable in manual tapping setups and rigid CNC tapping cycles.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e5\/16-18 UNC thread size with right-hand thread direction\u003c\/li\u003e\n  \u003cli\u003eBottoming chamfer with 1 to 1.5 chamfered threads for near-bottom thread start\u003c\/li\u003e\n  \u003cli\u003eCobalt high-speed steel construction for elevated heat and wear resistance\u003c\/li\u003e\n  \u003cli\u003eTiN coating reduces friction and extends tap service life\u003c\/li\u003e\n  \u003cli\u003eH6 thread limit for controlled tolerance class fits\u003c\/li\u003e\n  \u003cli\u003eChipless cold-forming action eliminates chip evacuation concerns in blind holes\u003c\/li\u003e\n  \u003cli\u003eCompatible with coolant-free tapping setups (coolant-through not required)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eRated for thread forming in alloy steel, carbon steel, die steel, hardened steel, stainless steel, and aluminum workpieces. Material Application Codes P and N confirm suitability across these material groups. Designed for blind hole applications requiring 5\/16-18 UNC internal threads.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThread forming taps require a specific forming tap drill size — consult OSG or standard forming tap drill charts for the correct pre-drill diameter before use, as a standard tap drill will produce incorrect thread form. Verify spindle RPM and apply appropriate tapping lubricant or cutting fluid matched to the workpiece material before starting the cycle. Rigid tapping mode is strongly recommended on CNC equipment to prevent tap breakage. Always bring the machine to a complete stop and ensure all energy sources are isolated before changing tooling.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/16-18\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 18\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfered Threads\u003c\/strong\u003e: 1 to 1.5 P\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.719 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.6654 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTapping Depth\u003c\/strong\u003e: 1.126 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.318 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.238 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cobalt High-Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiN (Titanium Nitride)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Blind Hole Threading\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: HY-PRO NRT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.065 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: OSG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1400130005\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51727372878130,"sku":"1400130005","price":46.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f9e0a7535aeb52c331c9ab34d6077839_4f473e04-c8cf-4541-a88c-d494164dadc4.jpg?v=1788676915","url":"https:\/\/voomisupply.com\/products\/osg-1400130005-thread-forming-tap-5-16-18-unc-bottoming-tin","provider":"Voomi Supply","version":"1.0","type":"link"}