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

unit: mm unit: mm

Major Minor Major Minor

Pitch Diameter Pitch Diameter

Diameter Diameter Diameter Diameter

Size Class Upper Lower Size Class Upper Lower

Tolerance Tolerance Tolerance Tolerance

Basic Size Basic Size Basic Size Basic Size Basic Size Basic Size

(μm)(μm)(μm)(μm)

STI M 2.6 ×0.45 b 3.185 2.892 18 6 2.698 b 18 6

STI No. 2 - 56 UNC 2.773 2.479 2.283

b 18 6 GH2 25.4 12.7

STI M 3 ×0.5 3.650 3.324 3.108

G3 38 25 b 18 6

STI No. 4 - 40 UNC 3.670 3.258 2.981

b 18 6 GH2 25.4 12.7

STI M 4 ×0.7 4.909 4.454 4.151

G45138STINo. 4 - 48 UNFb3.5323.1891862.958
b186STINo. 5 - 40 UNCb4.0003.5891863.312

STI M 5 ×0.8 6.039 5.519 5.173

G4 51 38 b 18 6

STI No. 6 - 32 UNC 4.536 4.021 3.678

b 18 6 GH3 38.1 25.4

STI M 6 ×1 7.299 6.649 6.216

G45138STINo. 6 - 40 UNFb4.3303.9191863.642
b186b186
STI M 8×1.259.6248.8128.271STINo. 8 - 32 UNC5.1974.6814.338
G45138GH338.125.4
b227STINo. 8 - 36 UNFb5.0834.6251864.318
STI M 10 ×1.511.94810.97410.324
G56451b186
STINo. 10 - 24 UNC6.2015.5135.055
STI M 10 ×1.25b11.62410.81218610.271GH225.412.7
STI M 10 × 1b11.29910.64918610.216b186
STINo. 10 - 32 UNF5.8575.3414.998
b227GH225.412.7
STI M 12 × 1.7514.27313.13612.379
G67664STINo. 12 - 24 UNCb6.8616.1731865.716
STI M 12 × 1.5b13.94812.97421712.324b227
STI1/4 - 20 UNC8.0007.1746.626
STI M 12 × 1.25b13.62412.81221712.271GH338.125.4
STI M 14 × 2b16.59815.29922714.433b186
STI1/4 - 28 UNF7.5286.9396.545
STI M 14 × 1.5b15.94814.97421714.324GH225.412.7
STI M 16 × 2b18.59817.29922716.433b227
STI5/16 - 18 UNC9.7718.8548.244
STI M 16 × 1.5b17.94816.97421716.324GH338.125.4
STI M 18 × 2.5b21.24819.624301018.542STI5/- 24 UNFb9.3138.6241868.167

16

STI M 18 × 1.5 b 19.948 18.974 24 8 18.324 b 22 7

STI 3/ 8 - 16 UNC 11.587 10.556 9.867

STI M 20 × 2.5b23.24821.624301020.542GH338.125.4
STI M 20 × 1.5b21.94820.97424820.324STI3/- 24 UNFb10.90010.2121869.754

8

STI M 22 × 2.5 b 25.248 23.624 30 10 22.542 b 30 10

STI 7/ 16 - 14 UNC 13.469 12.291 11.506

STI M 22 × 1.5b23.94822.97424822.324GH338.125.4
STI M 24 × 3b27.89725.948301024.649b186

STI 7/ 16 - 20 UNF 12.762 11.937 11.388

STI M 24 × 1.5b25.94824.97424824.324GH338.125.4
b3010

STI 1/2 - 13 UNC 15.238 13.968 13.122

GH3 38.1 25.4

STI1/2 - 20 UNFb14.35013.52418612.976
STI5/ 8 - 11 UNCb18.87517.376301016.376
STI5/ 8 - 18 UNFb17.70816.79121716.181
STI3/4 - 16 UNFb21.11220.08121719.392