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Tapping Home > Tapping > UNIFED THREAD TAPS > STI TAPS
Spiral Point STI Tap Plug Style - ST / SI SERIES

Size T.P.I EDP No. Class of Fit Overall Length Thread Length Neck Length Shank Diameter Square Size Square Length No. of Flute
D1 Hardslick L2 L1 L3 D2 K Kl
#4 40UNC SI162 2B 2.000 0.413 0.689 0.141 0.110 0.190 3
#4 48UNF ST182 2B 2.000 0.413 0.689 0.141 0.110 0.190 3
#6 32UNC SI242 2B 2.374 0.531 0.906 0.194 0.152 0.250 3
#6 40UNF ST262 2B 2.126 0.453 0.752 0.168 0.131 0.250 3
#8 32UNC SI282 2B 2.374 0.571 0.906 0.220 0.165 0.280 3
#8 36UNF ST302 2B 2.374 0.571 0.906 0.220 0.165 0.280 3
#10 24UNC SI322 2B 2.500 0.591 1.000 0.255 0.191 0.310 3
#10 32UNF ST342 2B 2.500 0.591 1.000 0.255 0.191 0.310 3
1/4 20UNC SI402 2B 2.720 0.669 1.126 0.318 0.238 0.380 3
1/4 28UNF ST422 2B 2.720 0.669 1.126 0.318 0.238 0.380 3
5/16 18UNC SI442 2B 2.937 0.748 1.252 0.381 0.286 0.440 3
5/16 24UNF ST462 2B 2.937 0.748 1.252 0.381 0.286 0.440 3
3/8 16UNC SI482 2B 3.374 0.984 1.657 0.367 0.275 0.440 3
3/8 24UNF ST502 2B 3.157 0.866 1.437 0.323 0.242 0.410 3
7/16 14UNC SI522 2B 3.594 0.984 1.657 0.429 0.322 0.500 3
7/16 20UNF ST542 2B 3.374 0.984 1.657 0.367 0.275 0.440 3
1/2 13UNC SI562 2B 3.811 1.083 1.811 0.480 0.360 0.560 3
1/2 20UNF ST582 2B 3.594 0.984 1.657 0.429 0.322 0.500 3
9/16 12UNC SI602 2B 4.031 1.083 1.811 0.542 0.406 0.630 3
9/16 18UNF ST622 2B 3.811 1.083 1.811 0.480 0.360 0.560 3
5/8 11UNC SI642 2B 4.252 1.201 2.000 0.590 0.442 0.690 3
5/8 18UNF ST662 2B 4.031 1.083 1.811 0.542 0.406 0.630 3
3/4 10UNC SI702 2B 4.689 1.339 2.220 0.697 0.523 0.750 3
3/4 16UNF ST722 2B 4.469 1.201 2.000 0.652 0.489 0.690 3
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