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Tapping Home > Tapping > UNIFED THREAD TAPS > STI TAPS
Spiral Flute STI Tap Bottoming 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 ST162 2B 2.000 0.276 0.689 0.141 0.110 0.190 3
#4 48UNF SI182 2B 2.000 0.276 0.689 0.141 0.110 0.190 3
#5 40UNC ST202 2B 2.126 0.276 0.752 0.168 0.131 0.250 3
#5 44UNF SI222 2B 2.126 0.276 0.752 0.168 0.131 0.250 3
#6 32UNC ST242 2B 2.374 0.354 0.906 0.194 0.152 0.250 3
#6 40UNF SI262 2B 2.126 0.276 0.752 0.168 0.131 0.250 3
#8 32UNC ST282 2B 2.374 0.354 0.906 0.220 0.165 0.280 3
#8 36UNF SI302 2B 2.374 0.354 0.906 0.220 0.165 0.280 3
#10 24UNC ST322 2B 2.500 0.433 1.000 0.255 0.191 0.310 3
#10 32UNF SI342 2B 2.500 0.433 1.000 0.255 0.191 0.310 3
#12 24UNC ST362 2B 2.720 0.472 1.126 0.318 0.238 0.380 3
#12 28UNF SI382 2B 2.720 0.472 1.126 0.318 0.238 0.380 3
1/4 20UNC ST402 2B 2.720 0.472 1.126 0.318 0.238 0.380 3
1/4 28UNF SI422 2B 2.720 0.472 1.126 0.318 0.238 0.380 3
5/16 18UNC ST442 2B 2.937 0.551 1.252 0.381 0.286 0.440 3
5/16 24UNF SI462 2B 2.937 0.551 1.252 0.381 0.286 0.440 3
3/8 16UNC ST482 2B 3.374 0.630 2.067 0.367 0.275 0.440 3
3/8 24UNF SI502 2B 3.157 0.591 1.850 0.323 0.242 0.410 3
7/16 14UNC ST522 2B 3.594 0.709 2.067 0.429 0.322 0.500 3
7/16 20UNF SI542 2B 3.374 0.630 2.067 0.367 0.275 0.440 3
1/2 13UNC ST562 2B 3.811 0.748 2.205 0.480 0.360 0.560 3
1/2 20UNF SI582 2B 3.594 0.709 2.067 0.429 0.322 0.500 3
9/16 12UNC ST602 2B 4.031 0.748 2.205 0.542 0.406 0.630 4
9/16 18UNF SI622 2B 3.811 0.748 2.205 0.480 0.360 0.560 4
5/8 11UNC ST642 2B 4.252 0.827 2.480 0.590 0.442 0.690 4
5/8 18UNF SI662 2B 4.031 0.748 2.205 0.542 0.406 0.630 4
3/4 10UNC ST702 2B 4.689 0.827 2.815 0.697 0.523 0.750 4
3/4 16UNF SI722 2B 4.469 0.827 2.480 0.652 0.489 0.690 4
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