■ for Helical Coil Wire Thread Inserts, Metric Threads ■ for Helical Coil Wire Thread Inserts, Unified Threads

Unit : mm unit: mm

Bored hole size Bored hole size Minor diameter of internal threads (D ) Bored hole size

Nominal size Size 1

( ref.) ( ref.) Max. Min.

STI M 2 ×0.42.15STI No. 2- 56 UNC2.4402.2842.40
STI M 2.5×0.452.66STI No. 4- 40 UNC3.1802.9853.13
STI M 2.6×0.452.76STI No. 4- 48 UNF3.1212.9623.08
STI M 3 ×0.53.18STI No. 5- 40 UNC3.4873.3153.44
STI M 4 ×0.74.27STI No. 6- 32 UNC3.8783.6783.83
STI M 5 ×0.85.29STI No. 6- 40 UNF3.8173.6453.77
STI M 6 ×16.38STI No. 8- 32 UNC4.5234.3394.48
STI M 8 ×1.258.47STI No. 8- 36 UNF4.4984.3214.45
STI M10 ×1.510.56STI No. 10- 24 UNC5.2835.0555.23
STI M10 ×1.2510.47STI No. 10- 32 UNF5.1844.9995.14
STI M10×110.38STI No. 12- 24 UNC5.9435.7155.89
STI M12×1.7512.66STI1/ - 20 UNC6.8686.6256.81

4

STI M12×1.5 12.56 STI 1/ - 28 UNF 6.720 6.546 6.68

4

STI M12×1.25 12.47 STI 5/ - 18 UNC 8.488 8.243 8.43

16

STI M14×2 14.75 STI 5/ - 24 UNF 8.351 8.167 8.31

16

STI M14×1.5 14.56 STI 3/ - 16 UNC 10.126 9.868 10.06

8

STI M14×1.25 14.47 STI 3/ - 24 UNF 9.931 9.754 9.89

8

STI M16×2 16.75 STI 7/ - 14 UNC 11.783 11.507 11.71

16

STI M16×1.5 16.56 STI 7/ - 20 UNF 11.584 11.387 11.53

16

STI M18×2.5 18.93 STI 1/ - 13 UNC 13.393 13.122 13.33

2

STI M18×1.5 18.56 STI 1/ - 20 UNF 13.172 12.975 13.12

2

STI M20×2.5 20.93 STI 5/ - 11 UNC 16.672 16.376 16.60

8

STI M20×1.5 20.56 STI 5/ - 18 UNF 16.385 16.180 16.33

8

STI M22×2.5 22.93 STI 3/ - 16 UNF 19.608 19.393 19.55

4 STI M22×1.5 22.56 STI M24×3 25.11 STI M24×1.5 24.56

  • The figures listed above are according to the data provided by helical coil wire insert manufacturers.