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Machine Nut Tap UNF
BS949
Nominal
Diameter
d/ins
TPI
Overall
Length
L ins
Length of
Thread
l ins
Diameter
of Shank
d 1 ins
Square A/F
ins
Length of
Square
l 2 ins
No. 6 40 3.75 0.750 0.090 0.070 0.250
No. 8 36 3.75 1.000 0.113 0.087 0.281
No.10 32 4.25 1.000 0.132 0.100 0.312
1/4 28 5.00 1.250 0.185 0.139 0.562
5/16 24 5.50 1.375 0.240 0.180 0.625
3/8 24 6.00 1.500 0.294 0.220 0.687
7/16 20 6.50 1.750 0.345 0.259 0.750
1/2 20 7.00 1.875 0.367 0.275 0.875
9/16 18 7.50 2.000 0.450 0.337 0.875
5/8 18 8.00 2.250 0.503 0.377 0.937
3/4 16 9.00 2.500 0.616 0.462 1.000
7/8 14 10.00 2.750 0.727 0.545 1.062
1 12 11.00 3.000 0.834 0.625 1.125
Machine Nut Tap - UNF
No. 6 No. 8 No. 10 1/4 5/16 3/8 7/16 1/2 9/16 5/8
No. of Flutes 3 3 3 3 3 3 3 3 3 3
3/4 7/8 1
No. of Flutes 3 3 3
LONG REACH TAPS
Machine Nut Tap BSF
BS949
Nominal
Diameter
d/ins
TPI
Overall
Length
L ins
Length of
Thread
l ins
Diameter
of Shank
d 1 ins
Square A/F
ins
www.goliathinternational.com
Length of
Square
l 2 ins
3/16 32 4.25 1.000 0.132 0.100 0.312
1/4 26 5.00 1.250 0.185 0.139 0.562
5/16 22 5.50 1.375 0.240 0.180 0.625
3/8 20 6.00 1.500 0.294 0.220 0.687
7/16 18 6.50 1.750 0.345 0.259 0.750
1/2 16 7.00 1.875 0.367 0.275 0.875
9/16 16 7.50 2.000 0.450 0.337 0.875
5/8 14 8.00 2.250 0.503 0.377 0.937
3/4 12 9.00 2.500 0.616 0.462 1.000
7/8 11 10.00 2.750 0.727 0.545 1.062
1 10 11.00 3.000 1.125 0.625 1.125
HIGH SPEED STEEL
GROUND THREAD
31