
■ On parts made from comparatively soft materials, helical E coil wire thread inserts are often used in order to strengthen internal screws and increase toughness. SP OX STI Oxide produces threads oversize enough to accommodate helical Recommended Tapping Speed depending on Materials coil wire thread inserts. ow carbon steelsBrass
〜 (m/min) For icon explanation, refer to P.50
Segment:1C
| Size | Class | Code | Chamfer | L | ℓ | ℓn | ℓs | Ds | K | ℓk | No. of | Type |
| (inch) | (inch) | (inch) | (inch) | (inch) | (inch) | (inch) | flutes |
For Helical Coil Wire Screw Thread Inserts, for Unified Threads GH1 SUUN2E1NEX
STI No.2-56UNC 2P 2.205 0.354 0.709 1.28 0.141 0.11 0.187 2 1
GH2 SUUN2E2NEX GH1 SUUN4H1NEX
STI No.4-40UNC 2P 2.48 0.512 0.827 1.496 0.168 0.131 0.25 2 1
GH2 SUUN4H2NEX GH1 SUUN6J1NEX
STI No.6-32UNC 2P 2.756 0.551 0.945 1.654 0.194 0.131 0.25 3 1
GH2 SUUN6J2NEX GH1 SUUN8J1NEX
STI No.8-32UNC 2P 3.15 0.591 0.984 1.929 0.220 0.165 0.281 3 1
GH2 SUUN8J2NEX GH2 SUUNAM2NEX
STI No.10-24UNC 2P 3.15 0.591 1.181 1.713 0.255 0.191 0.312 3 1
GH3 SUUNAM3NEX GH2 SUUNAJ2NEX
STI No.10-32UNF 2P 3.15 0.591 1.181 1.713 0.255 0.191 0.312 3 1
GH3 SUUNAJ3NEX GH2 SUU04K2NEX
STI 1/4-20UNC 2P 3.543 0.748 1.378 1.831 0.318 0.238 0.375 3 2
GH3 SUU04N3NEX GH2 SUU04N2NEX
STI 1/4-28UNF 2P 3.543 0.748 1.378 1.831 0.318 0.238 0.375 3 2
GH3 SUU04K3NEX GH2 SUU05O2NEX
STI 5/16-18UNC 2P 3.937 0.906 1.535 2.067 0.381 0.286 0.437 3 2
GH3 SUU05O3NEX GH2 SUU05M2NEX
STI 5/16-24UNF 2P 3.937 0.906 1.535 2.028 0.381 0.286 0.437 3 2
GH3 SUU05M3NEX GH2 SUU06P2NEX
STI 3/8-16UNC 2P 4.331 1.024 - 2.205 0.367 0.275 0.437 3 3
GH3 SUU06P3NEX GH2 SUU06M2NEX GH3 SUU06M3NEX