{"product_id":"accupro-13085-01c-thread-forming-tap-5-16-18-unc-bottoming","title":"Accupro 13085-01C Thread Forming Tap 5\/16-18 Unc Bottoming","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ACCUPRO 13085-01C is a thread forming tap designed for cutting 5\/16-18 UNC internal threads in blind hole applications. Unlike cutting taps, thread forming taps displace material rather than remove it, producing stronger threads with no chips to clear. This tap is manufactured from powdered metal high speed steel and finished with a TiCN coating for extended wear resistance at elevated temperatures. The bottoming chamfer, with approximately 2.5 chamfered threads, allows threading close to the bottom of a blind hole. Machinists and tool-and-die tradespeople use this tap in CNC machining centers, manual mills, and drill presses where a clean, chipless thread form is required in ductile metals.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for threading ductile materials such as aluminum, mild steel, brass, and similar alloys where cold-forming is practical. The bottoming configuration makes it the correct choice when thread depth must extend as close as possible to the bottom of a blind bore. It produces a Class 3B fit with a thread limit of H5, making it appropriate for precision assemblies requiring tighter tolerances. Right-hand thread direction covers the majority of standard fastener applications in both production and maintenance shop environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eThread forming design displaces material rather than cutting, producing stronger threads and eliminating chips in blind holes\u003c\/li\u003e\n  \u003cli\u003eTiCN coating improves surface hardness and heat resistance for longer tool life compared to uncoated HSS\u003c\/li\u003e\n  \u003cli\u003ePowdered metal high speed steel construction provides finer grain structure and improved wear resistance over conventional HSS\u003c\/li\u003e\n  \u003cli\u003eBottoming chamfer (2.5P) allows threading to within a few threads of blind hole bottom\u003c\/li\u003e\n  \u003cli\u003eH5 thread limit and Class 3B fit for precision thread forming in close-tolerance applications\u003c\/li\u003e\n  \u003cli\u003eSingle oil groove aids lubrication during the forming process\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in standard tap holders and collet chucks accepting a 0.318-inch shank diameter. Suitable for right-hand, 5\/16-18 UNC blind hole threading in ductile metals on CNC and manual machine tools.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThread forming taps require a specific forming tap drill size, which differs from a standard tap drill  -  consult a forming tap drill chart for the correct hole diameter before use. Apply cutting oil or tapping fluid appropriate for the workpiece material to prevent galling and extend tap life. Secure the tap in a rigid holder to maintain alignment with the bore centerline and avoid tap breakage. Power down the machine and secure the workpiece fully before mounting or removing the tap.\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\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: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfered Threads\u003c\/strong\u003e: 2.5P\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: H5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Powdered Metal High Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.7188 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.880 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.318 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTapping Depth\u003c\/strong\u003e: 1.125 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\u003eOil Grooves\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Blind Hole Threading\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 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: ACCUPRO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 13085-01C\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51786896245042,"sku":"13085-01C","price":62.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c475b48d6bf73248ecc78b802d312f1d.jpg?v=1789207977","url":"https:\/\/voomisupply.com\/products\/accupro-13085-01c-thread-forming-tap-5-16-18-unc-bottoming","provider":"Voomi Supply","version":"1.0","type":"link"}