{"product_id":"value-collection-msc-04540290-spiral-point-tap-1-4-28-unf","title":"Value Collection MSC-04540290 Spiral Point Tap 1\/4-28 Unf","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION MSC-04540290 is a spiral point tap designed for cutting 1\/4-28 UNF threads in through-hole and shallow blind-hole applications. Built from high speed steel (HSS) with a bright uncoated finish, this tap is suited for general-purpose threading on steel, aluminum, and similar materials. The bottoming chamfer allows threading close to the bottom of a hole where standard or plug chamfer taps cannot reach. With a 2-flute spiral point geometry, the tap pushes chips forward ahead of the cutting action, reducing clogging in through-hole work. The H3 thread limit ensures consistent fit within the 3B class of fit tolerance range.\u003c\/p\u003e\u003cp\u003eThis tap is used in machine shop, maintenance, and fabrication environments where 1\/4-28 UNF fine-thread forms are required. Bottoming taps are typically the final tap used in a three-tap sequence after a taper and plug tap have started the thread. It is appropriate for production machining, manual tapping, and repair work on threaded fastener holes in metal components. Right-hand thread direction is standard for the vast majority of fastener applications.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBottoming chamfer for threading close to the bottom of a hole\u003c\/li\u003e\n\u003cli\u003eSpiral point geometry pushes chips forward, ideal for through-hole tapping\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction provides hardness and wear resistance\u003c\/li\u003e\n\u003cli\u003eH3 thread limit for 3B class of fit tolerance compliance\u003c\/li\u003e\n\u003cli\u003eBright uncoated finish for use across a range of common materials\u003c\/li\u003e\n\u003cli\u003eRight-hand thread cutting direction\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for cutting 1\/4-28 UNF right-hand internal threads per Unified National Fine thread standards. Fits standard 1\/4-28 tap holders and collets compatible with the tap shank dimensions.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eA licensed machinist or experienced technician should select the correct tap drill size per UNF standards before tapping to ensure proper thread engagement. Secure the workpiece and use appropriate cutting fluid for the material being tapped to extend tool life and improve thread quality. Avoid excessive force when approaching the bottom of a blind hole with a bottoming tap, as the cutting flutes do not extend to the shank and breakage can occur if the tap bottoms out under load. Inspect threads with a 3B go\/no-go gauge after tapping to verify dimensional compliance.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-28 UNF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 3B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High Speed Steel (HSS)\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\u003eWeight\u003c\/strong\u003e: 0.1 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241600\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: MSC-04540290\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51695200076082,"sku":"MSC-04540290","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/79cebdaf3b18c84f9953eb17fe9b0de2.jpg?v=1788332449","url":"https:\/\/voomisupply.com\/products\/value-collection-msc-04540290-spiral-point-tap-1-4-28-unf","provider":"Voomi Supply","version":"1.0","type":"link"}