{"product_id":"unified-national-course-unc-taps","title":"UNIFIED NATIONAL COURSE UNC TAPS","description":"\u003cp\u003eSutton Tools manufactures high-quality UNC (Unified National Course) thread taps designed for specialized engineering, automotive, and aerospace applications where custom or fine-pitch thread configurations are required.\u003c\/p\u003e\n\u003cdiv class=\"n6owBd awi2gc\"\u003eHere is the exact breakdown of what \u003cstrong class=\"Yjhzub\"\u003e#8-32\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e means:\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"otQkpb\" role=\"heading\"\u003e1. The \"#8\" Represents the Major Diameter\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"n6owBd awi2gc\"\u003eThe first number specifies the nominal outside diameter of the screw thread. For sizes smaller than 1\/4 inch, the UTS system uses a numbering scale from #0 to #12.\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/div\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"T286Pc\"\u003e\u003cstrong class=\"Yjhzub\"\u003ePhysical Dimension:\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e A #8 screw has a major outer diameter of \u003cstrong class=\"Yjhzub\"\u003e0.164 inches\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e (approximately \u003cstrong class=\"Yjhzub\"\u003e4.17 mm\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e).\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"T286Pc\"\u003e\u003cstrong class=\"Yjhzub\"\u003eThe Formula:\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e You can calculate the diameter of machine screw numbers using the formula:\u003cbr\u003eDiameter =(Screw Number X 0.013) + 0.060\u003cbr\u003eDiameter =(8 X 0.013)+0.060 = 0.164 inches\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/li\u003e\n\u003c!--TgQPHd||[]--\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"otQkpb\" role=\"heading\"\u003e2. The \"32\" Represents the Threads Per Inch (TPI)\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"n6owBd awi2gc\"\u003eThe second number defines the thread pitch count.\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/div\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"T286Pc\"\u003e\u003cstrong class=\"Yjhzub\"\u003eThread Count:\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e There are exactly \u003cstrong class=\"Yjhzub\"\u003e32 individual thread crests per inch\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e of axial screw length.\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"T286Pc\"\u003e\u003cstrong class=\"Yjhzub\"\u003eThread Pitch:\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e The distance from one thread peak to the next is 1\/32 of an inch, which is \u003cstrong class=\"Yjhzub\"\u003e0.03125 inches\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e (or \u003cstrong class=\"Yjhzub\"\u003e0.794 mm\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e).\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/li\u003e\n\u003c!--TgQPHd||[]--\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"otQkpb\" role=\"heading\"\u003e3. Thread Series Designation (UNC)\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"n6owBd awi2gc\"\u003eAn #8-32 thread belongs to the \u003cstrong class=\"Yjhzub\"\u003eUNC (Unified National Coarse)\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e thread series. It is the most common thread pitch for a #8 screw size. (By contrast, the less common fine-thread version is a #8-36 UNF).\u003c\/div\u003e\n\u003cdiv class=\"n6owBd awi2gc\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"n6owBd awi2gc\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cdiv class=\"otQkpb\" role=\"heading\"\u003e\n\u003cstrong\u003e1. Taper Tap (Starter Tap)\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"n6owBd awi2gc\"\u003eThe Taper Tap is designed to initiate the threading process.\u003cspan\u003e \u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/div\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"T286Pc\"\u003e\u003cstrong class=\"Yjhzub\"\u003eThe Tip Chamfer:\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e It features a long, gradual taper spanning \u003cstrong class=\"Yjhzub\"\u003e7 to 10 threads\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e at the tip.\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"T286Pc\"\u003e\u003cstrong class=\"Yjhzub\"\u003eThe Purpose:\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e Because of the long taper, the tool enters the pre-drilled hole effortlessly and ensures the thread starts perfectly straight and aligned. It distributes the cutting force across many teeth, making it very easy to turn.\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"T286Pc\"\u003e\u003cstrong class=\"Yjhzub\"\u003eLimitation:\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e It will not cut full, usable threads near the bottom of a hole because the tip is tapered down.\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/li\u003e\n\u003c!--TgQPHd||[]--\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"otQkpb\" role=\"heading\"\u003e\n\u003cstrong\u003e2. Plug Tap (Intermediate \/ Second Tap)\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"n6owBd awi2gc\"\u003eThe Plug Tap is the most versatile and frequently used style of the three.\u003cspan\u003e \u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/div\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"T286Pc\"\u003e\u003cstrong class=\"Yjhzub\"\u003eThe Tip Chamfer:\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e It features a moderate taper spanning \u003cstrong class=\"Yjhzub\"\u003e3 to 5 threads\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e at the tip.\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"T286Pc\"\u003e\u003cstrong class=\"Yjhzub\"\u003eThe Purpose:\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e In open through-holes, a plug tap can often be used all by itself to cut the entire thread in one pass. In a blind hole, it is used second—following the Taper Tap—to cut the threads much deeper toward the floor.\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"T286Pc\"\u003e\u003cstrong class=\"Yjhzub\"\u003eLimitation:\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e Like the taper, it still leaves the bottom 3 to 5 threads incomplete.\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/li\u003e\n\u003c!--TgQPHd||[]--\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"otQkpb\" role=\"heading\"\u003e\n\u003cstrong\u003e3. Bottoming Tap (Finisher Tap)\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"n6owBd awi2gc\"\u003eThe Bottoming Tap is used exclusively to finish a blind hole.\u003c!--TgQPHd||[]--\u003e\n\u003c\/div\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"T286Pc\"\u003e\u003cstrong class=\"Yjhzub\"\u003eThe Tip Chamfer:\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e It features a very short, aggressive taper of only \u003cstrong class=\"Yjhzub\"\u003e1 to 2 threads\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e at the tip.\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"T286Pc\"\u003e\u003cstrong class=\"Yjhzub\"\u003eThe Purpose:\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e It is used as the final step after the hole has already been pre-threaded by the Taper and Plug taps. It allows you to cut full, functional threads all the way down to the very floor of a dead-end hole.\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"T286Pc\"\u003e\u003cstrong class=\"Yjhzub\"\u003eLimitation:\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e Never try to start a fresh thread with a bottoming tap. Because it has almost no alignment lead-in, it takes immense force to turn, is highly likely to start crooked, and will easily snap.\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/li\u003e\n\u003c!--TgQPHd||[]--\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/div\u003e\n\u003chr class=\"j3tEEe\"\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"otQkpb\" role=\"heading\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/div\u003e\n\u003chr class=\"j3tEEe\"\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/div\u003e","brand":"Sutton Tools","offers":[{"title":"#8 X 32 \/ TAPER","offer_id":47943284162754,"sku":"T4140417","price":26.0,"currency_code":"AUD","in_stock":true},{"title":"#8 X 32 \/ INTERMEDIATE","offer_id":47943284195522,"sku":"T4150417","price":26.0,"currency_code":"AUD","in_stock":true},{"title":"#8 X 32 \/ BOTTOMING","offer_id":47943284228290,"sku":"T4160417","price":26.0,"currency_code":"AUD","in_stock":true},{"title":"#10 X 24 \/ TAPER","offer_id":47943284261058,"sku":"T4140483","price":26.0,"currency_code":"AUD","in_stock":true},{"title":"#10 X 24 \/ INTERMEDIATE","offer_id":47943284293826,"sku":"T4150483","price":26.0,"currency_code":"AUD","in_stock":true},{"title":"#10 X 24 \/ BOTTOMING","offer_id":47943284326594,"sku":"T4160483","price":26.0,"currency_code":"AUD","in_stock":true},{"title":"3\/16 X 24 \/ TAPER","offer_id":47943284359362,"sku":"T4140476","price":26.0,"currency_code":"AUD","in_stock":true},{"title":"3\/16 X 24 \/ INTERMEDIATE","offer_id":47943284392130,"sku":"T4150476","price":26.0,"currency_code":"AUD","in_stock":true},{"title":"3\/16 X 24 \/ BOTTOMING","offer_id":47943284424898,"sku":"T4160476","price":26.0,"currency_code":"AUD","in_stock":true},{"title":"1\/4 X 20 \/ TAPER","offer_id":47943284457666,"sku":"T4140635","price":26.0,"currency_code":"AUD","in_stock":true},{"title":"1\/4 X 20 \/ INTERMEDIATE","offer_id":47943284490434,"sku":"T4150635","price":26.0,"currency_code":"AUD","in_stock":true},{"title":"1\/4 X 20 \/ BOTTOMING","offer_id":47943284523202,"sku":"T4160635","price":26.0,"currency_code":"AUD","in_stock":true},{"title":"5\/16 X 18 \/ TAPER","offer_id":47943284555970,"sku":"T4160794","price":26.0,"currency_code":"AUD","in_stock":false},{"title":"5\/16 X 18 \/ INTERMEDIATE","offer_id":47943284588738,"sku":"T4150794","price":26.0,"currency_code":"AUD","in_stock":true},{"title":"5\/16 X 18 \/ BOTTOMING","offer_id":47943284621506,"sku":"T4160794","price":26.0,"currency_code":"AUD","in_stock":true},{"title":"3\/8 X 16 \/ TAPER","offer_id":47943284654274,"sku":"T4140953","price":33.0,"currency_code":"AUD","in_stock":true},{"title":"3\/8 X 16 \/ INTERMEDIATE","offer_id":47943284687042,"sku":"T4150953","price":33.0,"currency_code":"AUD","in_stock":true},{"title":"3\/8 X 16 \/ BOTTOMING","offer_id":47943284719810,"sku":"T4160953","price":33.0,"currency_code":"AUD","in_stock":true},{"title":"7\/16 X 14 \/ TAPER","offer_id":47943284752578,"sku":"T4141111","price":45.0,"currency_code":"AUD","in_stock":true},{"title":"7\/16 X 14 \/ INTERMEDIATE","offer_id":47943284785346,"sku":"T4151111","price":45.0,"currency_code":"AUD","in_stock":true},{"title":"7\/16 X 14 \/ BOTTOMING","offer_id":47943284818114,"sku":"T4161111","price":45.0,"currency_code":"AUD","in_stock":true},{"title":"1\/2 X 13 \/ TAPER","offer_id":47943284850882,"sku":"T4141270","price":50.0,"currency_code":"AUD","in_stock":true},{"title":"1\/2 X 13 \/ INTERMEDIATE","offer_id":47943284883650,"sku":"T4151270","price":50.0,"currency_code":"AUD","in_stock":true},{"title":"1\/2 X 13 \/ BOTTOMING","offer_id":47943284916418,"sku":"T4161270","price":50.0,"currency_code":"AUD","in_stock":true},{"title":"5\/8 X 11 \/ TAPER","offer_id":47943284949186,"sku":"T4141588","price":79.0,"currency_code":"AUD","in_stock":true},{"title":"5\/8 X 11 \/ INTERMEDIATE","offer_id":47943284981954,"sku":"T4151588","price":79.0,"currency_code":"AUD","in_stock":true},{"title":"5\/8 X 11 \/ BOTTOMING","offer_id":47943285014722,"sku":"T4161588","price":79.0,"currency_code":"AUD","in_stock":true},{"title":"3\/4 X 10 \/ TAPER","offer_id":47943285047490,"sku":"T4141905","price":100.0,"currency_code":"AUD","in_stock":true},{"title":"3\/4 X 10 \/ INTERMEDIATE","offer_id":47943285080258,"sku":"T4151905","price":100.0,"currency_code":"AUD","in_stock":true},{"title":"3\/4 X 10 \/ BOTTOMING","offer_id":47943285113026,"sku":"T4161905","price":100.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0601\/6335\/8914\/files\/TAPMETRIC_6d716d1e-4992-4bcf-aafd-adf1d266a19f.png?v=1782111438","url":"https:\/\/www.srbindustrialsupplies.com\/products\/unified-national-course-unc-taps","provider":"SRB INDUSTRIAL SUPPLY","version":"1.0","type":"link"}