GUHRING - Каталог Метчики - 2011 EN
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5NIVERSAL!PPLICATIONS
!LLOYED5NALLOYED3TEELS
ANSI length - ANSI shank UNF
Series 3983 - Cobalt, UNF, spiral point, TiN coated, H7 tolerance H7 / H11
Tolerance
Size No. Shank dia. Square Size Overall Actual Series Order
6-40 Length H7 Through Hole
8-36 Flutes inch inch 3983 No. 0° Helix
10-32 3 0.141 0.110 inch Limits 3.505 Plug Tap
12-28 3 0.168 0.131 2.000 H7 4.166 Cut Taps
1/4-28 3 0.194 0.152 2.130 H7 4.826 Chamfer Lead
5/16-24 3 0.220 0.165 2.382 H7 5.486
3/8-24 3 0.255 0.191 2.382 H7 6.350
7/16-20 3 0.318 0.238 2.500 H7 7.938
1/2-20 3 0.381 0.286 2.720 H7 9.525
5/8-18 3 0.323 0.242 2.941 H7 11.113
4 0.367 0.275 3.157 H7 12.700
4 0.480 0.360 3.381 H7 15.875
3.811 H7
ANSI length - ANSI shank B · 3.5 - 5
Series 3987 - Cobalt, UNF, spiral point, TiN coated, H11 tolerance
Size No. Shank dia. Square Size Overall Actual Series Order
6-40 Length H11
8-36 Flutes inch inch 3987 No.
10-32 3 0.141 0.110 inch Limits z 3.505
12-28 3 0.168 0.131 2.000 H11 z 4.166
1/4-28 3 0.194 0.152 2.130 H11 z 4.826
5/16-24 3 0.220 0.165 2.382 H11 z 5.486
3/8-24 3 0.255 0.191 2.382 H11 z 6.350
7/16-20 3 0.318 0.238 2.500 H11 z 7.938
1/2-20 3 0.381 0.286 2.720 H11 z 9.525
5/8-18 3 0.323 0.242 2.941 H11 z 11.113
4 0.367 0.275 3.157 H11 z 12.700
4 0.480 0.360 3.381 H11 z 15.875
3.811 H11
Refer to pages 142-145 for additional dimensional information
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