{"product_id":"value-collection-jy4918090-straight-flute-tap-7-8-9-unc","title":"Value Collection JY4918090 Straight Flute Tap 7\/8-9 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION JY4918090 is a straight flute tap designed to cut left-hand internal threads to the 7\/8-9 UNC standard. It features 4 flutes, a plug chamfer for general through-hole and blind-hole threading applications, and is manufactured from high-speed steel with a bright\/uncoated finish. The H4 thread limit provides the oversize allowance needed to meet 3B class of fit tolerances. With an overall length of 4.6875 inches and a weight of 0.872 pounds, this tap is suited for machinists, maintenance technicians, and toolroom professionals working with left-hand threaded fastener applications.\u003c\/p\u003e\n\u003cp\u003eThis tap is intended for use in manual or machine tapping operations where a left-hand 7\/8-9 UNC thread form is required. Left-hand threads are commonly specified in applications where counter-rotation would otherwise loosen a standard right-hand fastener, such as certain spindle assemblies, bicycle components, and rotating shaft hardware. The plug chamfer style makes it versatile for starting threads in both through-holes and deeper blind holes where a taper tap is not required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLeft-hand thread direction for counter-rotation fastening applications\u003c\/li\u003e\n  \u003cli\u003e7\/8-9 UNC thread form with 3B class of fit for standard tolerance internal threads\u003c\/li\u003e\n  \u003cli\u003eH4 thread limit provides proper oversize allowance for 3B fit\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer style suitable for through-holes and moderate-depth blind holes\u003c\/li\u003e\n  \u003cli\u003e4-flute straight flute geometry for use in most standard tapping operations\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction with bright\/uncoated finish for general-purpose use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct substitute for straight flute taps in 7\/8-9 UNC left-hand applications requiring a plug chamfer, H4 thread limit, and 3B class of fit.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap should be installed and operated by a qualified machinist or toolroom professional familiar with tapping feeds, speeds, and cutting fluid requirements for high-speed steel tooling. Always secure the workpiece and use appropriate cutting fluid or tapping compound to extend tool life and achieve clean thread forms. Confirm left-hand thread direction requirements before use, as left-hand taps rotate opposite to standard right-hand taps. Inspect the tap and tap holder for runout before operation to avoid tap breakage.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 7\/8-9\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Left 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: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Style\u003c\/strong\u003e: Plug\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.6875 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  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.872 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: JY4918090\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51691825889586,"sku":"JY4918090","price":91.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/98da5f38050c0cfef39f425d74567070.jpg?v=1788290173","url":"https:\/\/voomisupply.com\/products\/value-collection-jy4918090-straight-flute-tap-7-8-9-unc","provider":"Voomi Supply","version":"1.0","type":"link"}