{"product_id":"value-collection-jy4872156-straight-flute-tap-1-3-8-16-uns","title":"Value Collection JY4872156 Straight Flute Tap 1-3\/8-16 Uns","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION JY4872156 is a straight flute tap designed to cut 1-3\/8-16 UNS internal threads in through-hole and bottoming applications. Manufactured from high-speed steel with a bright, uncoated finish, this tap features six flutes and a bottoming chamfer that allows threading close to the bottom of a blind hole. The H4 thread limit designation controls the pitch diameter tolerance for a 3B class of fit, making it suitable for standard-tolerance threaded assemblies. Overall length is 4 inches. Right-hand thread direction is standard. This tool is used by machinists and maintenance technicians working on heavy industrial fastening applications.\u003c\/p\u003e\n\u003cp\u003eThis tap is well-suited for production and maintenance shops that require UNS (Unified National Special) thread forms in larger diameters. The bottoming chamfer style makes it the right choice when full thread depth is needed in a blind hole, typically used as the final tap in a two- or three-tap sequence following a taper or plug tap. Applications include fabrication of heavy machinery components, repair of existing threaded bores, and custom fastener installations where standard thread series do not apply.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBottoming chamfer allows threading to within 1-2 thread pitches of the bottom of a blind hole\u003c\/li\u003e\n  \u003cli\u003eSix flutes provide additional cutting edges and improved chip distribution during the tapping operation\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction offers good wear resistance across a range of workpiece materials\u003c\/li\u003e\n  \u003cli\u003eBright, uncoated finish — no coating buildup that could affect thread tolerance in precision fits\u003c\/li\u003e\n  \u003cli\u003eH4 thread limit controls pitch diameter for consistent 3B class of fit results\u003c\/li\u003e\n  \u003cli\u003eRight-hand thread direction; standard for the majority of threaded fastener applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned to cut 1-3\/8-16 UNS internal threads with a 3B class of fit in compatible workpiece materials. Verify material machinability and use appropriate cutting fluid for the workpiece being tapped.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eTapping operations should be performed by qualified machinists or maintenance technicians familiar with thread-cutting tooling and applicable shop safety practices. Always secure the workpiece firmly and ensure the tap is properly aligned before beginning the cut to avoid tap breakage. Use an appropriate cutting fluid or tapping compound for the workpiece material to reduce heat and extend tool life. When using a bottoming tap in a blind hole, clear chips frequently by reversing the tap to prevent chip packing at the bottom of the bore.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1-3\/8-16\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 3B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOversize\u003c\/strong\u003e: No\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: VALUE COLLECTION\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: JY4872156\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51692073943346,"sku":"JY4872156","price":299.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5edd0e9431b24c163225fd0155a99f34.jpg?v=1788292727","url":"https:\/\/voomisupply.com\/products\/value-collection-jy4872156-straight-flute-tap-1-3-8-16-uns","provider":"Voomi Supply","version":"1.0","type":"link"}