insert

Screw Thread Inserts Information

Insert Specifications         Cross References


Insert Specifications

NC Insert Specifications         NF Insert Specifications

Unified Coarse Specifications, Free Running (series ST) and Locking Inserts (series STL)
Nominal
Thread Size
Outside Diameter Number of coils per insert
Min. Max. 1 Dia. 1.5 Dia. 2 Dia. 2.5 Dia. 3 Dia.
2(.086)-56 .110 .119 3 5-1/4 7-3/8 9-5/8 11-7/8
3(.099)-48 .128 .139 2-7/8 5 7-1/4 9-3/8 11-7/8
4(.112)-40 .144 .159 2-3/4 4-3/4 6-3/4 8-7/8 10-7/8
 
5(.125)-40 .158 .173 3-1/4 5-1/2 7-3/4 10 12-1/4
6(.138)-32 .178 .193 2-3/4 4-3/4 6-7/8 8-7/8 10-7/8
8(.164)-32 .205 .220 3-1/2 6 8-3/8 10-3/4 13-1/4
 
10(.190)-24 .244 .259 2-7/8 5 7-1/8 9-1/4 11-3/8
12(.216)-24 .270 .285 3-1/2 6 8-3/8 10-5/8 13-1/8
1/4(.250)-20 .310 .330 3-3/8 5-3/4 8 10-3/8 12-3/4
 
5/18(.3125)-18 .380 .400 4 6-5/8 9-1/4 11-7/8 14-5/8
3/8(.3750)-16 .452 .472 4-3/8 7-1/4 10 12-7/8 15-3/4
7/16(.4375)-14 .526 .551 4-1/2 7-3/8 10-1/4 13-1/8 16-1/8
1/2(.5000)-13 .597 .662 4-7/8 7-7/8 11 14-1/8 17-1/8
 
9/16(.5625)-12 .669 .694 5-1/8 8-1/4 11-1/2 14-3/4 17-1/8
5/8(.6250)-11 .742 .767 5-1/4 8-1/2 11-3/4 15 18-3/8
3/4(.750)-10 .881 .906 5-7/8 9-3/8 13 16-1/2 20-1/8
7/8(.8750)-9 1.022 1.052 6-1/4 10 13-3/4 17-1/2 21-1/4
1(1.0000)-8 1.166 1.196 6-3/8 10-1/8 14 17-3/4 21-5/8
 
1-1/8(1.1250)-7 1.315 1.355 6-1/8 9-7/8 13-5/8 17-1/2 21-1/4
1-1/4(1.2500)-7 1.443 1.483 6-1/8 9-7/8 13-5/8 17-1/2 21-1/4
1-3/8(1.3750)-6 1.598 1.643 6-1/2 10-1/2 14-3/8 18-3/8 22-1/4
1-1/2(1.5000)-6 1.727 1.772 7-1/4 11-1/2 15-7/8 20-1/8 24-1/2





Unified Fine Specifications, Free Running (series ST )and Locking Inserts ( series STL)
Nominal
Thread Size
Outside Diameter Number of coils per insert
Min. Max. 1 Dia. 1.5 Dia. 2 Dia. 2.5 Dia. 3 Dia.
3(.099)-56 .131 .146 3-3/8 5-5/8 8 10-3/8 12-5/8
4(.112)-48 .147 .162 3-3/8 5-3/8 7-7/8 10-1/4 12-1/2
6(.138)-40 .173 .193 3-1/2 6 8-3/8 10-3/4 13-1/4
8(.164)-36 .204 .224 3-7/8 6-1/2 9-1/8 11-5/8 14-1/4
 
10(.190)-32 .236 .256 4-1/8 6-7/8 9-1/2 12-1/4 14-7/8
1/4(.250)-28 .306 .326 5 8-1/4 11-3/8 14-1/2 17-5/8
5/16(.3125)-24 .380 .400 5-1/2 8-7/8 12-1/4 15-7/8 19
3/8(.3750)-24 .448 .468 6-7/8 11 15 19-1/8 23-1/8
 
7/16(.4375)-20 .524 .549 6-5/8 10-5/8 14-5/8 18-1/2 22-1/2
1/2(.5000)-20 .592 .617 7-7/8 12-3/8 16-7/8 21-3/8 25-7/8
9/16(.5625)-18 .666 .691 8 12-1/2 17-1/8 21-3/4 26-1/4
5/8(.6250)-18 .733 .758 9 14-1/8 19-1/4 24-1/4 29-3/8
 
3/4(.750)-16 .876 .901 9-3/4 15-1/8 20-5/8 26 31-1/2
7/8(.8750)-14 1.021 1.051 9-7/8 15-1/2 21-1/8 26-5/8 32-1/4
1(1.0000)-14 1.156 1.186 11-1/2 17-7/8 24-1/4 30-5/8 37
1(1.0000)-12 1.169 1.199 9-5/8 15 20-1/2 26 31-1/2
 
1-1/8(1.1250)-12 1.304 1.334 11-1/8 17-1/4 23-3/8 29-1/2 35-3/4
1-1/4(1.2500)-12 1.439 1.469 12-1/2 19-3/8 26-1/4 33 39-7/8
1-3/8(1.3750)-12 1.575 1.610 13-3/4 21-3/8 28-7/8 36-1/2 44
1-1/2(1.5000)-12 1.710 1.745 15-1/4 23-1/2 31-5/8 39-7/8 48-1/8





Cross References

Inch National Coarse UNC
Free-Running Series Screw Locking Series
Newman #
ST
MS #
122
Recoil #
0
Heli-coil #
1185-
Newman #
STL
MS #
21209-C
Recoil #
1
Heli-coil #
3585-
1/4-20x0375 122121 03042 4CNx0375 1/4-20x0375 21209-C4-15 13043 4cnx0375


Inch National Fine UNF
Free-Running Series Screw Locking Series
Newman #
ST
MS #
124
Recoil #
0
Heli-coil #
1191-
Newman #
STL
MS #
21209-
Recoil #
1
Heli-coil #
3591-
1/4-28x0375 124696 04043 4CNx0375 1/4-28x0375 F4-15 14043 4cnx0375


Metric Coarse
Free-Running Series Screw Locking Series
Newman #
STM
M.A. #
3279-
Recoil #
0
Heli-coil #
1084-
Newman #
STLM
M.A. #
3329-
Recoil #
1
Heli-coil #
4184-
6x1x9.0 156 05063 6CNx9.0 6x1x9.0 156 15063 6CNx9.0




 



links to:
Recoil Screw Thread Insert General Page   |    Thread Kits, American Thread Forms
Thread Kits, Metric Thread Forms   |    Thread Kits, British Thread Forms

 

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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Miramar, Hampton, West Valley City, Warren, Olathe, Columbia, Thornton, Carrollton, Midland, Charleston, Waco and the states of Alabama, AL, Alaska, AK, Arizona, AZ, Arkansas, AR, California, CA, Colorado, CO, Connecticut, CT, Delaware, DE, District of Columbia, DC, Florida, FL, Georgia, GA, Hawaii, HI, Idaho, ID, Illinois, IL, Indiana, IN, Iowa, IA, Kansas, KS, Kentucky, KY, Louisiana, LA, Maine, ME, Maryland, MD, Massachusetts, MA, Michigan, MI, Minnesota, MN, Mississippi, MS, Missouri, MO, Montana, MT, Nebraska, NE, Nevada, NV, New Hampshire, NH, New Jersey, NJ, New Mexico, NM, New York, NY, North Carolina, NC, North Dakota, ND, Ohio, OH, Oklahoma, OK, Oregon, OR, Pennsylvania, PA, Rhode Island, RI, South Carolina, SC, South Dakota, SD, Tennessee, TN, Texas, TX, Utah, UT, Vermont, VT, Virginia, VA, Washington, WA, West Virginia, WV, Wisconsin, WI, Wyoming, WY We can ship to Afghanistan , Aland Islands , Albania , Algeria , American Samoa , AS, Andorra , Angola , Anguilla , Antigua & 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