{"product_id":"value-collection-jy4838751-hand-tap-12-40-uns-bottoming-hss","title":"Value Collection JY4838751 Hand Tap 12-40 Uns Bottoming Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION JY4838751 is a bottoming hand tap designed for cutting 12-40 UNS internal threads in through-holes and blind holes where full thread depth is required close to the bottom. Manufactured from high speed steel (HSS) with a bright, uncoated finish, this tap delivers consistent thread form across a range of workpiece materials. It features a 4-flute straight flute geometry and a right-hand thread direction. The overall length is 2-3\/8 inches, and it is ground to a Class 3B fit with an H2 thread limit for close-tolerance threading work. Machinists, toolmakers, and maintenance technicians are the typical users.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for hand tapping operations in machine shops, maintenance and repair environments, and production settings where 12-40 UNS threads are specified. The bottoming chamfer — typically 1 to 2 thread leads — allows threading to within one or two threads of a blind hole bottom. It is used after a taper or plug tap has started the thread, completing the thread profile at full depth. Applications include fastener holes in precision assemblies, jigs, fixtures, and tooling components where the UNS thread standard applies.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBottoming chamfer for threading to the bottom of blind holes\u003c\/li\u003e\n  \u003cli\u003eHigh speed steel construction for durability across common workpiece materials\u003c\/li\u003e\n  \u003cli\u003eBright, uncoated finish suitable for general-purpose hand tapping\u003c\/li\u003e\n  \u003cli\u003e4-flute straight flute design for balanced cutting action and chip clearance\u003c\/li\u003e\n  \u003cli\u003eClass 3B fit with H2 thread limit for close-tolerance internal threads\u003c\/li\u003e\n  \u003cli\u003eRight-hand thread direction, 12-40 UNS thread form\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for cutting 12-40 UNS internal threads. Intended for use with a standard tap wrench or T-handle for hand tapping operations. Typically used as the final tap in a taper-plug-bottoming tap sequence for blind holes.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap is installed using a tap wrench sized appropriately for the square shank drive. Secure the workpiece before tapping and apply cutting fluid to reduce heat and extend tap life. Use moderate, consistent torque and back off periodically to break chips. Inspect the tap for wear or chipping before each use — a damaged tap can seize in the hole and cause the tap to break.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 12-40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNS\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: H2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Straight\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\u003eOverall Length\u003c\/strong\u003e: 2-3\/8 inches\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: JY4838751\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51697674387762,"sku":"JY4838751","price":56.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/195606024b56ca87a812b866ef991df7.jpg?v=1788354015","url":"https:\/\/voomisupply.com\/products\/value-collection-jy4838751-hand-tap-12-40-uns-bottoming-hss","provider":"Voomi Supply","version":"1.0","type":"link"}