{"product_id":"osg-1625004405-thread-forming-tap-4-40-unc-cobalt-ticn","title":"Osg 1625004405 Thread Forming Tap 4-40 Unc Cobalt Ticn","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1625004405 is a thread forming tap designed for producing internal threads without cutting chips, reducing the risk of chip contamination in blind holes. Part of the EXOPRO XPF Series 16250, it is manufactured from cobalt high-speed steel and finished with a TiCN coating to improve wear resistance and reduce friction during tapping. The tap is configured for 4-40 UNC threads at a 2B class of fit with a modified bottoming chamfer of 2.5 to 3 threads, making it suited for shallow-depth thread forming applications. Right-hand thread direction and an H5 thread limit provide consistent thread quality across production runs. Licensed machinists and tooling specialists install this tap in machine shops, MRO environments, and production facilities.\u003c\/p\u003e\n\u003cp\u003eThis tap is built for thread forming in a wide range of materials including aluminum, cast aluminum, carbon steel, alloy steel, die steel, hardened steel, stainless steel, high-nickel alloys, and titanium. It is appropriate for both blind hole and through-hole threading operations where chip-free thread forming is required. The 4-40 UNC designation targets small-fastener applications common in precision manufacturing, electronics assembly, and instrumentation work. The TiCN coating supports extended tool life when running at elevated speeds in abrasive or work-hardening materials.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCobalt high-speed steel construction for heat and wear resistance in demanding materials\u003c\/li\u003e\n  \u003cli\u003eTiCN coating reduces friction and extends tool life in abrasive materials\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer (2.5 to 3 threads) enables threading close to the bottom of blind holes\u003c\/li\u003e\n  \u003cli\u003eH5 thread limit and 2B class of fit ensure consistent, in-tolerance thread production\u003c\/li\u003e\n  \u003cli\u003eChip-free thread forming process eliminates chip contamination risk in blind hole applications\u003c\/li\u003e\n  \u003cli\u003eCompatible with aluminum, stainless steel, titanium, high-nickel alloys, and multiple steel grades\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in blind hole and through-hole threading operations requiring 4-40 UNC threads in materials coded P, M, N, and H, including aluminum, carbon steel, alloy steel, die steel, hardened steel, stainless steel, high-nickel alloys, and titanium.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap is installed by machinists using standard tapping machines, CNC machining centers, or hand tapping equipment rated for small-diameter work. The spindle and workpiece must be properly secured and aligned before operation to prevent tap breakage at this diameter. Appropriate cutting fluid or tapping compound for the workpiece material should be applied to reduce heat and extend tap life. Coolant-through is not supported on this tap, so external lubrication is required.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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\u003eClass of Fit\u003c\/strong\u003e: 2B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Modified Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfered Threads\u003c\/strong\u003e: 2.5 to 3\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: TiCN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: EXOPRO XPF 16250\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.2047 inches (56 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.3114 inches (approximately 9\/16 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTapping Depth\u003c\/strong\u003e: 0.7210 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.1410 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.1100 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\u003eWeight\u003c\/strong\u003e: 0.011 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 1625004405\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51728521920818,"sku":"1625004405","price":92.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4471ba0f13eef757eb17d1c6cd840262.jpg?v=1788692645","url":"https:\/\/voomisupply.com\/products\/osg-1625004405-thread-forming-tap-4-40-unc-cobalt-ticn","provider":"Voomi Supply","version":"1.0","type":"link"}