{"product_id":"osg-1405002108-thread-forming-tap-4-40-unc-bottoming-hss","title":"Osg 1405002108 Thread Forming Tap 4-40 Unc Bottoming Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1405002108 is a thread forming tap in the EXOTAP VP-NRT series, designed for cold-forming internal threads in ductile metals without cutting or producing chips. Built from powdered metal high-speed steel (PM-HSS) with a TiCN coating, this bottoming tap produces 4-40 UNC right-hand threads and is engineered for blind hole applications where maximum thread depth close to the bottom of the bore is required. The H4 thread limit designation ensures consistent, controlled fit tolerances. At 1.875 inches overall length, this tap is sized for standard machine tapping setups used by machinists and tool-and-die professionals.\u003c\/p\u003e\u003cp\u003eThis tap is suited for production and job-shop environments where blind hole threading in ductile materials is common. Rated for use in alloy steel, carbon steel, die steel, hardened steel, stainless steel, and aluminum, it covers a broad range of ferrous and non-ferrous workpiece materials. The bottoming chamfer (1 to 1.5 chamfered threads) allows threading to within a very short distance of the hole bottom, making it the correct choice when thread engagement must start near the blind end. The tapping depth reaches 0.559 inches, and the thread length is 0.2953 inches.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCold-forming design eliminates chips, reducing tap breakage risk in blind holes\u003c\/li\u003e\n\u003cli\u003ePowdered metal HSS construction offers higher wear resistance than conventional HSS\u003c\/li\u003e\n\u003cli\u003eTiCN coating improves surface hardness and lubricity for extended tool life\u003c\/li\u003e\n\u003cli\u003eBottoming chamfer (1 to 1.5P) enables threading close to the bottom of blind holes\u003c\/li\u003e\n\u003cli\u003eH4 thread limit for controlled 4-40 UNC fit tolerances\u003c\/li\u003e\n\u003cli\u003eCompatible with alloy steel, carbon steel, die steel, hardened steel, stainless steel, and aluminum\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for blind hole thread forming in ductile materials including alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel. Material application codes P, M, and N apply. Not suitable for brittle materials or through-hole applications where chip formation is acceptable.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThread forming taps require a correctly sized forming tap drill hole  -  consult the appropriate forming tap drill chart for 4-40 UNC; the drill size differs from standard cut tap recommendations. Use a tapping lubricant or cutting fluid matched to the workpiece material. Secure the workpiece and use a tapping attachment or CNC rigid tapping cycle to maintain axial alignment and prevent tap breakage. Power down or de-energize any machine spindle before manually handling or changing the tap.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40\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: 40\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 1.5P\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Powdered Metal High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Blind Hole Threading\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.2953 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTapping Depth\u003c\/strong\u003e: 0.559 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.141 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.11 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.1875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: EXOTAP VP-NRT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 1405002108\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51743229116722,"sku":"1405002108","price":73.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1387a1cbc85e69f037e155e448d18e22_1f17e73c-2736-40ad-9660-febd9d7d9fd2.jpg?v=1788844224","url":"https:\/\/voomisupply.com\/products\/osg-1405002108-thread-forming-tap-4-40-unc-bottoming-hss","provider":"Voomi Supply","version":"1.0","type":"link"}