
■ ZELX NI SP STI is the tap for nickel base alloys which, with nickel as main composition, have much higher corrosion resistance and higher heat resistance than steels, Nitride Oxide and produces threads oversize enough to accommodate Recommended Tapping Speed depending on Materials helical coil wire thread inserts.
| ow carbon steels | Medium carbon steels | Stainless steels | ickel base alloys |
| 5〜15 | 5〜15 | 5〜15 | 5〜10 |
(m/min) For icon explanation, refer to P.50
Segment:1D
| Size | Class | Code | Chamfer | L | ℓ | ℓn | Ds | K | ℓk | No. of | Type |
| (inch) | (inch) | (inch) | (inch) | (inch) | (inch) | flutes |
For Helical Coil Wire Screw Thread Inserts, for Unified Threads
STI No.2-56UNC GH2 Y87400 3P 1.875 0.236 0.562 0.141 0.11 0.187 3 1
GH1 Y87403 3P Y87404 GH2
STI No.4-40UNC Y87004 1.5P 2 0.276 0.687 0.141 0.11 0.187 3 1
Y87420 3P GH3 Y87419 1.5P Y87408 3P GH2
| STI No.6-32UNC | Y87008 | 1.5P | 2.375 | 0.354 | 0.875 | 0.194 | 0.152 | 0.25 | 3 | 1 | |
| GH3 | Y87424 | 3P | |||||||||
| STI No.6-40UNF | GH2 | Y87409 | 3P | 2.125 | 0.276 | 0.75 | 0.168 | 0.131 | 0.25 | 3 | 1 |
GH1 Y81409
STI No.8-32UNC GH2 Y87410 3P 2.375 0.354 0.937 0.22 0.165 0.281 3 1
GH3 Y87426 GH2 Y87412 3P
STI No.10-24UNC Y87428 2.5 0.433 1 0.255 0.191 0.312 3 2
GH3 Y87028 1.5P GH2 Y87413 3P Y87429
STI No.10-32UNF GH3 2.5 0.354 1 0.255 0.191 0.312 3 2
Y87029