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Screw Thread Inserts Information

Insert Specifications         Cross References

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

Insert Specifications

NC Insert Specifications         NF Insert Specifications






Unified Coarse Specifications, Free Running and Locking Inserts
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



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Unified Fine Specifications, Free Running and Locking Inserts
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



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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



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