{"product_id":"value-collection-jy4878211-hand-tap-1-7-8-20-uns-bottoming-hss","title":"Value Collection JY4878211 Hand Tap 1-7\/8-20 Uns Bottoming Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION JY4878211 is a straight-flute hand tap designed for cutting 1-7\/8-20 UNS internal threads in a wide range of materials. Built from high speed steel (HSS) with a bright, uncoated finish, this tap delivers consistent thread geometry and durability across production and maintenance applications. The bottoming chamfer configuration allows threading to run close to the bottom of blind holes, making it the correct choice when full thread depth is required near the base of a bore. Overall length is 5 inches. Machinists, tool and die makers, and maintenance technicians are the primary users.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for threading operations in machine shops, maintenance facilities, and manufacturing environments where UNS thread forms are specified. The 1-7\/8-20 thread size places it in heavy industrial and precision mechanical applications. The 3B class of fit indicates a standard tolerance for general-purpose threaded assemblies. With six flutes and a straight-flute design, it is intended for use in through-hole and shallow blind-hole applications where chip evacuation can be managed manually or with appropriate cutting fluid.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBottoming chamfer for threading to the base of blind holes\u003c\/li\u003e\n  \u003cli\u003eHigh speed steel construction for wear resistance across a range of workpiece materials\u003c\/li\u003e\n  \u003cli\u003eBright (uncoated) finish — compatible with standard cutting oils and fluids\u003c\/li\u003e\n  \u003cli\u003eSix-flute straight-flute design for controlled chip formation\u003c\/li\u003e\n  \u003cli\u003eH6 thread limit for consistent tolerance control in 3B-class assemblies\u003c\/li\u003e\n  \u003cli\u003eRight-hand thread direction — standard for most UNS threaded applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style hand tap for cutting 1-7\/8-20 UNS right-hand internal threads in metalworking and machining operations where a bottoming chamfer and 3B class of fit are required.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap is installed by machinists or qualified maintenance personnel using a standard tap wrench or suitable holding fixture. The workpiece should be securely fixtured and the pilot hole drilled to the correct tap drill diameter for a 1-7\/8-20 thread before use. Apply appropriate cutting fluid throughout the tapping operation to extend tool life and improve thread finish. For blind holes, clear chips frequently to prevent tap breakage and ensure full thread depth is achieved safely.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1-7\/8-20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Style\u003c\/strong\u003e: Straight Flute\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\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: H6\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: JY4878211\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51696647602482,"sku":"JY4878211","price":502.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/df93131df19236d0a77d6d0540041a4f.jpg?v=1788344778","url":"https:\/\/voomisupply.com\/products\/value-collection-jy4878211-hand-tap-1-7-8-20-uns-bottoming-hss","provider":"Voomi Supply","version":"1.0","type":"link"}