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Tapping Home > Tapping > UNIFED THREAD TAPS > STI TAPS
SCREW THREAD INSERT SPIRAL POINT TAPS

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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