{"product_id":"value-collection-jy4862173-hand-tap-1-1-8-18-unef","title":"Value Collection JY4862173 Hand Tap 1-1\/8-18 Unef","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION JY4862173 is a straight-flute hand tap designed for cutting 1-1\/8-18 Unified Extra Fine (UNEF) internal threads in ferrous and non-ferrous workpieces. Built from high speed steel (HSS) with a bright, uncoated finish, this tap delivers consistent thread form on the bench or in a drill press at moderate cutting speeds. The plug chamfer — 3 to 5 threads of lead — makes it the standard choice for through-holes and for starting threads in blind holes that have adequate depth. Six flutes provide good chip clearance and even cutting pressure across the thread profile. Overall length is 4 inches, and the H4 thread limit controls oversize tolerance for close-tolerance Class 3B fits.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for maintenance shops, toolrooms, and production environments where UNEF threads are required on larger-diameter fastener applications. The 1-1\/8-18 UNEF designation is common in precision assemblies, aerospace-adjacent work, and hydraulic fittings where a finer pitch than UNC or UNF is specified. Right-hand threading direction is standard. It is installed by hand with a tap wrench or a tapping fixture and does not require coolant-through tooling, making it compatible with manual or light CNC tapping operations where flood or mist coolant is applied externally.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1-1\/8-18 UNEF thread form — extra-fine pitch for precise thread engagement\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer provides 3-5 threads of lead for easy starting in through-holes or deep blind holes\u003c\/li\u003e\n  \u003cli\u003e6-flute geometry distributes cutting load and improves chip evacuation\u003c\/li\u003e\n  \u003cli\u003eHigh speed steel construction handles a broad range of workpiece materials\u003c\/li\u003e\n  \u003cli\u003eBright uncoated finish — suitable for use with cutting oil or coolant\u003c\/li\u003e\n  \u003cli\u003eClass 3B fit with H4 thread limit for tight-tolerance thread applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard hand tap for cutting 1-1\/8-18 UNEF Class 3B internal threads in accordance with Unified thread standards. Fits standard tap wrench collets and tapping heads sized for the tap shank associated with 1-1\/8-inch diameter taps.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap is installed by a machinist or toolroom technician using a proper-size tap wrench or tapping fixture — never drive with an impact tool. Secure the workpiece before starting and apply cutting oil or appropriate tapping fluid throughout the operation. Back the tap off periodically to break and clear chips, especially in blind-hole applications. Inspect the tap for chipping or wear before each use; a damaged tap run under load can break and seize in the workpiece.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1-1\/8-18\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNEF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Plug\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: H4\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\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  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.71 pounds\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: JY4862173\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51695272821042,"sku":"JY4862173","price":147.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7726e541b9aef7e602c1998ec96a0688.jpg?v=1788333409","url":"https:\/\/voomisupply.com\/products\/value-collection-jy4862173-hand-tap-1-1-8-18-unef","provider":"Voomi Supply","version":"1.0","type":"link"}