Taps:  Inch Sizes

NC, NF, NEF, 8 tpi, 12 tpi


We have a huge assortment of standard and special sizes including inch, metric and british sizes.

Did you know you can order special size taps manufactured in 24 hours?


 

 

NC (national coarse)

Order NC taps on line   add to cart

Order NC Dies on line   add to cart

Size Threads per Inch Major Outside Diameter
     
No 1 64 .073"
No 2 56 .086"
No 3 48 .099"
     
No 4 40 .112"
No 5 40 .125"
No 6 32 .138"
     
No 8 32 .164"
No 10 24 .190"
No 12 24 .216"
     
1/4" 20 .250"
5/16" 18 .3125"
3/8" 16 .375"
     
7/16" 14 .4375"
1/2" 13 .500"
9/16" 12 .5625"
     
5/8" 11 .625"
3/4" 10 .750"
7/8" 9 .875"
     
1" 8 1.000"
1-1/8" 7 1.125"
1-1/4" 7 1.250"
     
1-3/8" 6 1.375"
1-1/2" 6 1.500"
1-3/4" 5 1.750"
     
2" 4-1/2 2.000"
2-1/4" 4-1/2 2.250"
2-1/2" 4 2.500"

when ordering taps please specify the diameter and pitch and style of tap

example

TAP1/4-20.1 for 1/4-28 taper tap
TAP1/4-20.2 for 1/4-28 plug tap
TAP1/4-20.3 for 1/4-28 bottoming tap
TAP1/4-20SP for 1/4-28 spiral pointed tap
TAP1/4-20QS for 1/4-28 quick spiral tap
TAP1/4-20NUT for 1/4-28 nut tap

 

 

NF ( national fine)

Order NF taps on Line  add to cart

Order NF dies on Line  add to cart

Size Threads per Inch Major Outside Diameter
No.0 80 .060"
No 1 72 .073"
No 2 64 .086"
No 3 56 .099"
     
No 4 48 .112"
No 5 44 .125"
No 6 40 .138"
     
No 8 36 .164"
No 10 32 .190"
No 12 28 .216"
     
1/4" 28 .250"
5/16" 24 .3125"
3/8" 24 .375"
     
7/16" 20 .4375"
1/2" 20 .500"
9/16" 18 .5625"
     
5/8" 18 .625"
3/4" 16 .750"
7/8" 14 .875"
     
1" 12 1.000"
1-1/8" 12 1.125"
1-1/4" 12 1.250"
     
1-3/8" 12 1.375"
1-1/2" 12 1.500"
1-3/4" 12 1.750"
     

when ordering taps please specify the diameter and pitch and style of tap

example

TAP1/4-28.1 for 1/4-28 taper tap
TAP1/4-28.2 for 1/4-28 plug tap
TAP1/4-28.3 for 1/4-28 bottoming tap
TAP1/4-28SP for 1/4-28 spiral pointed tap
TAP1/4-28QS for 1/4-28 quick spiral tap
TAP1/4-28NUT for 1/4-28 nut tap

 

 

 

 

NEF ( national extra fine)

Size Threads per Inch Major Outside Diameter
     
1/4" 32 .250"
5/16" 32 .3125"
3/8" 32 .375"
     
1/2" 28 .500"
     
5/8" 24 .625"
3/4" 20 .750"
7/8" 20 .875"
     
1" 20 1.000"
1-1/8" 18 1.125"
     
1-3/8" 18 1.375"
     

when ordering taps please specify the diameter and pitch and style of tap

example

TAP1/4-32.1 for 1/4-32 taper tap
TAP1/4-32.2 for 1/4-32 plug tap
TAP1/4-32.3 for 1/4-32 bottoming tap

 

 

 

8 TPI ( threads per inch)

Size Threads per Inch Major Outside Diameter
     
     
1-1/8" 8 1.125"
1-1/4" 8 1.250"
1-3/8" 8 1.375"
     
1-1/2" 8 1.500"
1-5/8" 8 1.625"
1.3/4" 8 1.750"
     
1-7/8" 8 1.875"
2" 8 2.000"
2-1/4" 8 2.250"
     
2-1/2" 8 2.500"
     

 

 

 

12TPI ( threads per inch)

Size Threads per Inch Major Outside Diameter
     
1-1/16" 12 1.0625"
1-3/16" 12 1.1875"
1-5/16" 12 1.3125"
     
1-5/8" 12 1.625"
1.3/4" 12 1.750"
1-7/8" 12 1.875"
     
2" 12 2.000"
2-1/4" 12 2.250"
2-1/2" 12 2.500"
     

link to index page

March 2022, October 2020, May 2020 , February 2018, November 2017, November 2009 CSS, Sept 2006

The descriptions, illustrations, specifications, dimensions, and part numbers are subject to change without notice.

servicing the Canadian provinces and territories of Newfoundland, NF, NL, Nova Scotia, NS, New Brunswick, NB, Prince Edward Island, PEI, PE, Quebec, PQ, QC, Ontario, ON, Manitoba, MB, Saskatchewan, SK, Alberta, AB, British Columbia, BC, Northwest Territories, NT, Nunavut, NU, Yukon, YT, servicing Canadian cities, Toronto, Mississauga, Scarborough, Laval , Montreal, Montréal, Vancouver, Ottawa, Gatineau, Calgary, Edmonton, Québec City, Winnipeg, Hamilton, Kitchener, Cambridge, Waterloo, London, St. Catharines , Niagara, Halifax, Oshawa, Victoria, Windsor, Saskatoon, Regina, Sherbrooke, St. John's, Barrie, Kelowna, Abbotsford, Mission, Sudbury Kingston, Saguenay, Trois-Rivieres, Trois Rivieres, Trois-Rivières, Guelph, Moncton, Brantford, Saint John, Thunder Bay, Peterborough, Ajax, Aurora, Brampton, Brock, Burlington, Caledon, Clarington, Durham Region, Oshawa, Pickering, Whitby, Halton Hills, Milton, Oakville, Mississauga, New market, Richmond Hill, Vaughn, Orangeville, servicing US 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