■ 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

Max.Min.( ref.)Max.Min.( ref.)
STI M2.6 × 0.452.7982.6982.77STI No. 4 - 40 UNC3.1802.9853.13
STI M 3 × 0.53.2213.1093.19STI No. 4 - 48 UNF3.1212.9623.08
STI M 4 × 0.74.2914.1514.26STI No. 5 - 40 UNC3.4873.3153.44
STI M 5 × 0.85.3335.1735.29STI No. 6 - 32 UNC3.8783.6783.83
STI M 6 × 16.4066.2166.36STI No. 6 - 40 UNF3.8173.6453.77
STI M 8 × 1.258.4838.2718.43STI No. 8 - 32 UNC4.5234.3394.48
STI M10 × 1.510.56110.32510.50STI No. 8 - 36 UNF4.4984.3214.45
STI M10 × 1.2510.48310.27110.43STI No. 10 - 24 UNC5.2835.0555.23
STI M10 × 110.40610.21610.36STI No. 10 - 32 UNF5.1844.9995.14
STI M12 × 1.7512.64412.37912.6STI No. 12 - 24 UNC5.9435.7155.89
STI M12 × 1.512.56112.32512.50STI1/4 - 20 UNC6.8686.6256.81
STI M12 × 1.2512.48312.27112.43STI1/4 - 28 UNF6.7206.5466.68
STI M14 × 214.73314.43314.7STI5/16 - 18 UNC8.4888.2438.43
STI M14 × 1.514.56114.32514.50STI5/16 - 24 UNF8.3518.1678.31
STI M14 × 1.2514.48314.27114.43STI3/ 8 - 16 UNC10.1269.86810.06
STI M16 × 216.73316.43316.7STI3/ 8 - 24 UNF9.9319.7549.89
STI M16 × 1.516.56116.32516.50STI7/16 - 14 UNC11.78311.50711.7
STI M18 × 2.518.89718.54218.8STI7/16 - 20 UNF11.58411.38711.53
STI M18 × 1.518.56118.32518.50STI1/ 2 - 13 UNC13.39313.12213.3
STI M20 × 2.520.89720.54220.8STI1/ 2 - 20 UNF13.17212.97513.12
STI M20 × 1.520.56120.32520.50STI5/ 8 - 11 UNC16.67216.37616.60
STI M22 × 2.522.89722.54222.8STI5/ 8 - 18 UNF16.38516.18016.33
STI M22 × 1.522.56122.32522.50STI3/4 - 10 UNC19.90819.59919.8
STI M24 × 325.04924.64924.9STI3/4 - 16 UNF19.60819.39319.55
STI M24 × 224.73324.43324.7
STI M24 × 1.524.56124.32524.50
  • The figures listed above are according to the data provided by helical coil wire insert manufacturers.

Technical Inf