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Tapping Home > Tapping > UNIFIED THREAD TAPS > BLUE RING TAPS
Spiral Flute Tap Modified Bottoming Style for Steels & Stainless Steels - BF / BK SERIES

Size T.P.I EDP No. Limit Overall Length Thread Length Neck Length Shank Diameter Square Size Square Length No. of Flute
D1 Steam Oxide Hardslick L2 L1 L3 D2 K Kl
#2 56UNC BF082 BK082 H2 1.752 0.157 0.433 0.141 0.110 0.190 2
#4 40UNC BF162 BK162 H2 2.205 0.236 0.563 0.141 0.110 0.190 2
#5 40UNC BF202 BK202 H2 2.205 0.236 0.626 0.141 0.110 0.190 3
#6 32UNC BF243 BK243 H3 2.205 0.276 0.689 0.141 0.110 0.190 3
#8 32UNF BF283 BK283 H3 2.480 0.276 0.752 0.168 0.131 0.250 3
#10 24UNC BF323 BK323 H3 2.756 0.354 0.906 0.194 0.152 0.250 3
#10 32UNF BF343 BK343 H3 2.756 0.276 0.906 0.194 0.152 0.250 3
1/4 20UNC BF403 BK403 H3 3.150 0.433 1.000 0.255 0.191 0.310 3
1/4 20UNC BF405 BK405 H5 3.150 0.433 1.000 0.255 0.191 0.310 3
1/4 28UNF BF423 BK423 H3 3.150 0.354 1.000 0.255 0.191 0.310 3
1/4 28UNF BF424 BK424 H4 3.150 0.354 1.000 0.255 0.191 0.310 3
5/16 18UNC BF445 BK445 H5 3.543 0.472 1.126 0.318 0.238 0.380 3
5/16 24UNF BF464 BK464 H4 3.543 0.472 1.126 0.318 0.238 0.380 3
3/8 16UNC BF485 BK485 H5 3.937 0.551 1.252 0.381 0.286 0.440 3
3/8 24UNF BF504 BK504 H4 3.937 0.394 1.252 0.381 0.286 0.440 3
7/16 14UNC BF525 BK525 H5 3.937 0.591 1.850 0.323 0.242 0.410 3
7/16 20UNF BF545 BK545 H5 3.937 0.472 1.850 0.323 0.242 0.410 3
1/2 13UNC BF565 BK565 H5 4.331 0.630 2.067 0.367 0.275 0.440 3
1/2 20UNF BF585 BK585 H5 3.937 0.472 2.067 0.367 0.275 0.440 3
9/16 12UNC BF605 BK605 H5 4.331 0.709 2.067 0.429 0.322 0.500 3
9/16 18UNF BF625 BK625 H5 3.937 0.512 2.067 0.429 0.322 0.500 3
5/8 11UNC BF645 BK645 H5 4.331 0.748 2.205 0.480 0.360 0.560 4
5/8 18UNF BF665 BK665 H5 3.937 0.512 2.205 0.480 0.360 0.560 4
3/4 10UNC BF705 BK705 H5 4.921 0.827 2.480 0.590 0.442 0.690 4
3/4 16UNF BF725 BK725 H5 4.331 0.591 2.480 0.590 0.442 0.690 4
7/8 9UNC BF746 BK746 H6 5.512 0.827 2.815 0.697 0.523 0.750 4
7/8 14UNF BF766 BK766 H6 4.921 0.709 2.815 0.697 0.523 0.750 4
1 8UNC BF786 BK786 H6 6.299 0.984 3.091 0.800 0.600 0.810 4
1 12UNF BF806 BK806 H6 5.512 0.709 3.091 0.800 0.600 0.810 4
1-1/8 8UN BF836 BK836 H6 7.087 1.260 3.740 0.896 0.672 0.880 4
1-1/4 8UN BF876 BK876 H6 7.087 1.260 3.740 1.021 0.766 1.000 4
1-3/8 8UN BF916 BK916 H6 7.874 1.260 3.937 1.108 0.831 1.060 4
1-1/2 8UN BF956 BK956 H6 7.874 1.260 3.937 1.233 0.925 1.130 4
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