
Basic major L ℓ ℓn ℓs Ds K ℓk No. of
Size Class Code Chamfer dia flutes Type Stock
(mm) (mm) (mm) (mm) (mm) (mm) (mm)
(mm) For Helical Coil Wire Screw Thread Inserts, for Metric Threads STI M3 × 0.5 ○
1b SW3.0G1LEN 2.5P 3.65 52 7.5 17 29 5 4 7 3 1
STI M4 × 0.7 ○
1b SW4.0I1LEN 2.5P 4.909 60 13 22 33 5.5 4.5 7 3 1
STI M5 × 0.8 ○
1b SW5.0K1LEN 2.5P 6.039 62 15 26 33 6 4.5 7 3 1
STI M6 × 1 ○
1b SW6.0M1LEN 2.5P 7.299 70 19 - 36 6.2 5 8 3 2
STI M8 × 1.25 ○
1b SW8.0N1LEN 2.5P 9.624 75 23 - 38 7 5.5 8 3 2
STI M10 × 1.5 ○
1b SW010O1LEN 2.5P 11.948 82 26 - 42 8.5 6.5 9 3 2
STI M10 × 1.25 △
1b SW010N1LEN 2.5P 11.624 82 26 - 42 8.5 6.5 9 3 2
STI M12 × 1.75 ○
1b SW012P1LEN 2.5P 14.273 95 26 - 48 12.5 10 13 3 2
STI M12 × 1.5 △
1b SW012O1LEN 2.5P 13.948 88 26 - 45 10.5 8 11 3 2
STI M12 × 1.25 △
1b SW012N1LEN 2.5P 13.624 88 26 - 45 10.5 8 11 3 2
STI M14 × 2 △
1b SW014Q1LEN 2.5P 16.598 100 33 - 51 14 11 14 3 2
STI M14 × 1.5 △
1b SW014O1LEN 2.5P 15.948 95 26 - 48 12.5 10 13 3 2
STI M16 × 2 ○
1b SW016Q1LEN 2.5P 18.598 105 33 - 50 15 12 15 4 3
STI M16 × 1.5 △
1b SW016O1LEN 2.5P 17.948 100 33 - 51 14 11 14 4 3
STI M18 × 2.5 △
1b SW018R1LEN 2.5P 21.248 115 33 - 55 17 13 16 4 3
STI M18 × 1.5 △
1b SW018O1LEN 2.5P 19.948 105 33 - 50 15 12 15 4 3
STI M20 × 2.5 ○
1b SW020R1LEN 2.5P 23.248 120 39 - 55 19 15 18 4 3
STI M20 × 1.5 △
1b SW020O1LEN 2.5P 21.948 115 33 - 55 17 13 16 4 3
STI M22 × 2.5 △
1b SW022R1LEN 2.5P 25.248 125 39 - 58 19 15 18 4 3
STI M24 × 3 ○
1b SW024S1LEN 2.5P 27.897 135 46 - 62 23 17 20 4 3