{"product_id":"value-collection-jy4872180-hand-tap-1-3-8-18-unef","title":"Value Collection JY4872180 Hand Tap 1-3\/8-18 Unef","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION JY4872180 is a straight-flute hand tap designed for cutting 1-3\/8-18 UNEF internal threads in through-holes and blind holes requiring thread cut to the bottom. Manufactured from high speed steel with a bright, uncoated finish, this tap delivers consistent performance in general threading applications across a range of ferrous and non-ferrous materials. The bottoming chamfer — typically 1 to 2 threads of lead — allows the tap to cut threads as close to the base of a blind hole as possible. At 4 inches overall length, it fits standard tap wrenches used in manual hand-tapping operations. The 6-flute geometry provides ample chip clearance and a stable cutting action in moderate-to-light duty applications.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for maintenance, repair, and production threading tasks where a UNEF 1-3\/8-18 thread is required. The bottoming configuration makes it the final tap used in a three-tap sequence — after taper and plug taps have started and progressed the thread — or as the sole tap in through-hole applications where full thread depth at the bottom of a blind bore is critical. It is commonly used by machinists, millwrights, and mechanical contractors working on threaded fastener repairs, tooling fixtures, and precision assemblies.\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\u003e1-3\/8-18 UNEF thread form meets Unified National Extra Fine standards\u003c\/li\u003e\n  \u003cli\u003e6-flute straight-flute design provides stable cutting and chip control\u003c\/li\u003e\n  \u003cli\u003eHigh speed steel construction handles a broad range of workpiece materials\u003c\/li\u003e\n  \u003cli\u003eBright, uncoated finish — no coating buildup to affect thread tolerance\u003c\/li\u003e\n  \u003cli\u003eClass of fit 3B with H4 thread limit for close-tolerance threaded connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in standard manual tap wrenches and T-handle wrenches that accept taps at this shank size. Cuts 1-3\/8-18 UNEF right-hand internal threads in compatible workpiece materials.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eHand tapping should be performed with the workpiece securely fixtured and the tap aligned perpendicular to the bore to prevent tap breakage and cross-threading. Apply cutting oil or tapping fluid appropriate to the workpiece material before and during the tapping operation. In a blind hole, clear chips frequently by reversing the tap to break and evacuate chips, especially with a bottoming tap at final depth. Inspect the tap for wear or chipping before each use; a damaged tap can ruin a workpiece and create extraction hazards.\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\/8-18\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: Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Straight\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\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: JY4872180\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51701161099570,"sku":"JY4872180","price":222.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1987e1611a36cfd31b32d773bed46225.jpg?v=1788399040","url":"https:\/\/voomisupply.com\/products\/value-collection-jy4872180-hand-tap-1-3-8-18-unef","provider":"Voomi Supply","version":"1.0","type":"link"}