{"product_id":"osg-1005200508-straight-flute-tap-5-16-18-unc-bottoming","title":"Osg 1005200508 Straight Flute Tap 5\/16-18 Unc Bottoming","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1005200508 is a straight flute machine tap designed for cutting 5\/16-18 UNC internal threads in a single pass. Built from powdered metal with a TiCN coating, it delivers extended tool life in demanding production environments. The bottoming chamfer geometry allows threading to the bottom of blind holes, making it the correct choice when full thread depth is required close to the hole floor. With 4 flutes and an H5 thread limit, this tap holds tight tolerances appropriate for 2B class of fit assemblies. Overall length is 2-23\/32 inches with a thread length of 1-1\/8 inches.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for machine tapping operations in metalworking shops, maintenance facilities, and production environments. It is rated for use in aluminum and cast iron applications. Right-hand thread direction makes it compatible with standard tapping attachments and CNC rigid tapping setups. The bottoming chamfer designates it for blind-hole work where spiral-point or plug taps cannot achieve full thread engagement. Series 10052 places it within OSG's standard machine tap line.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBottoming chamfer for threading to the base of blind holes\u003c\/li\u003e\n  \u003cli\u003ePowdered metal construction for improved wear resistance over standard HSS\u003c\/li\u003e\n  \u003cli\u003eTiCN coating reduces friction and extends tool life in aluminum and cast iron\u003c\/li\u003e\n  \u003cli\u003e4 flutes with H5 thread limit for consistent 2B class of fit tolerances\u003c\/li\u003e\n  \u003cli\u003eRight-hand, 5\/16-18 UNC thread form for standard inch fastener applications\u003c\/li\u003e\n  \u003cli\u003eNo coolant-through design — compatible with external flood or mist coolant delivery\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for machine tapping 5\/16-18 UNC threads in aluminum and cast iron workpieces. Compatible with standard straight-shank tapping chucks, floating tap holders, and CNC rigid tapping setups that accept the specified shank diameter of 0.318 inches.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and operation should be performed by a qualified machinist or tooling technician familiar with tapping speeds and feeds for the workpiece material. Ensure the spindle is stopped and the machine is in a safe state before loading or removing the tap from the holder. Use appropriate cutting fluid or coolant for the material being tapped — aluminum and cast iron have different lubrication requirements. Inspect the tap for chipping or wear before each use; a bottoming tap operated in a hole with insufficient chip clearance is prone to breakage.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/16-18 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\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: 2B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1-1\/8 inches (0.665 inches decimal)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-23\/32 inches (3.543 inches decimal \/ 90 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.318 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.238 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 1.377 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Powdered Metal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Aluminum, Cast Iron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 10052\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.068 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: OSG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1005200508\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51732375568690,"sku":"1005200508","price":56.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/703d85cfd23f3b5dc94413fd50652500.jpg?v=1788742213","url":"https:\/\/voomisupply.com\/products\/osg-1005200508-straight-flute-tap-5-16-18-unc-bottoming","provider":"Voomi Supply","version":"1.0","type":"link"}