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Technical Information Standard Tap Dimensions • Ground Thread • Reference USCTI Table 302
Blank Design 1 Blank Design 2 Blank Design 3
Technical Information nominal diameter range( in)
Y90 machine screw size number( in) nominal fractional diameter( in) nominal metric diameter mm( in) blank design number overall length L thread length l square length l2 shank diameter D1
. 052 –. 065
0
(. 0600)
—
M1.6
(. 0630)
1
1.63
. 31
. 19
. 1410
. 110
. 065 –. 078
1
(. 0730)
—
M1.8
(. 0709)
1
1.69
. 38
. 19
. 1410
. 110
. 078 –. 091
2
(. 0860)
—
M2( 0787),
M2.2(. 0866)
1
1.75
. 44
. 19
. 1410
. 110
. 091 –. 104
3
(. 0990)
—
M2.5
(. 0984)
1
1.81
. 50
. 19
. 1410
. 110
. 104 –. 117
4
(. 1120)
—
—
—
1
1.88
. 56
. 19
. 1410
. 110
. 117 –. 130
5
(. 1250)
—
M3
(. 1181)
1
1.94
. 63
. 19
. 1410
. 110
. 130 –. 145
6
(. 1380)
—
M3.5
(. 1378)
1
2.00
. 69
. 19
. 1410
. 110
. 145 –. 171
8
(. 1640)
—
M4
(. 1575)
1
2.13
. 75
. 25
. 1680
. 131
. 171 –. 197
10
(. 1900)
—
M4.5(. 1772),
M5(. 1969)
1
2.38
. 88
. 25
. 1940
. 152
. 197 –. 223
12
(. 2160)
—
—
—
1
2.38
. 94
. 28
. 2200
. 165
. 223 –. 260
—
1 / 4
(. 2500)
M6
(. 2362)
2
2.50
1.00
. 31
. 2550
. 191
. 260 –. 323
—
5 / 16
(. 3125)
M7(. 2756),
M8(. 3150)
2
2.72
1.13
. 38
. 3180
. 238
. 323 –. 395
—
3 / 8
(. 3750)
M10
(. 3937)
2
2.94
1.25
. 44
. 3810
. 286
. 395 –. 448
—
7 / 16
(. 4375)
—
—
3
3.16
1.44
. 41
. 3230
. 242
. 448 –. 510
—
1 / 2
(. 5000)
M12
(. 4724)
3
3.38
1.66
. 44
. 3670
. 275
. 510 –. 573
—
9 / 16
(. 5625)
M14
(. 5512)
3
3.59
1.66
. 50
. 4290
. 322
. 573 –. 635
—
5 / 8
(. 6250)
M16
(. 6299)
3
3.81
1.81
. 56
. 4800
. 360
. 635 –. 709
—
11 / 16
(. 6875)
M18
(. 7087)
3
4.03
1.81
. 63
. 5420
. 406
. 709 –. 760
—
3 / 4
(. 7500)
—
—
3
4.25
2.00
. 69
. 5900
. 442
. 760 –. 823
—
13 / 16
(. 8125)
M20
(. 7874)
3
4.47
2.00
. 69
. 6520
. 489
. 823 –. 885
—
7 / 8
(. 8750)
M22
(. 8661)
3
4.69
2.22
. 75
. 6970
. 523
. 885 –. 948
—
15 / 16
(. 9375)
M24
(. 9449)
3
4.91
2.22
. 75
. 7600
. 570
. 948 – 1.010
—
1
( 1.0000)
M25
(. 9843)
3
5.13
2.50
. 81
. 8000
. 600
1.010 – 1.073
—
1-1 / 16
( 1.0625)
M27
( 1.0630)
3
5.13
2.50
. 88
. 8960
. 672
1.073 – 1.135
—
1-1 / 8
( 1.1250)
—
—
3
5.44
2.56
. 88
. 8960
. 672
1.135 – 1.198
—
1-3 / 16
( 1.1875)
M30
( 1.1811)
3
5.44
2.56
1.00
1.0210
. 766
1.198 – 1.260
—
1-1 / 4
( 1.2500)
—
—
3
5.75
2.56
1.00
1.0210
. 766
1.260 – 1.323
—
1-5 / 16
( 1.3125)
M33
( 1.2992)
3
5.75
2.56
1.06
1.1080
. 831
1.323 – 1.385
—
1-3 / 8
( 1.3750)
—
—
3
6.06
3.00
1.06
1.1080
. 831
1.358 – 1.448
—
1-7 / 16
( 1.4375)
M36
( 1.4173)
3
6.06
3.00
1.13
1.2330
. 925
1.448 – 1.510
—
1-1 / 2
( 1.5000)
—
—
3
6.38
3.00
1.13
1.2330
. 925
1.510 – 1.635
—
1-5 / 8
( 1.6250)
M39
( 1.5354)
3
6.69
3.19
1.13
1.3050
. 979
1.635 – 1.760
—
1-3 / 4
( 1.7500)
M42
( 1.6535)
3
7.00
3.19
1.25
1.4300
1.072
1.760 – 1.885
—
1-7 / 8
( 1.8750)
—
—
3
7.31
3.56
1.25
1.5190
1.139
1.885 – 2.010
—
2
( 2.0000)
M48
( 1.8898)
3
7.63
3.56
1.38
1.6440
1.233
2.010 – 2.135
—
2-1 / 8
( 2.1250)
—
—
3
8.00
3.56
1.38
1.7690
1.327
2.135 – 2.260
—
2-1 / 4
( 2.2500)
M56
( 2.2047)
3
8.25
3.56
1.44
1.8940
1.420
2.260 – 2.385
—
2-3 / 8
( 2.3750)
—
—
3
8.50
4.00
1.44
2.0190
1.514
2.385 – 2.510
—
2-1 / 2
( 2.5000)
—
—
3
8.75
4.00
1.50
2.1000
1.575
2.510 – 2.635
—
2-5 / 8
( 2.6250)
M64
( 2.5197)
3
8.75
4.00
1.50
2.2250
1.669
2.635 – 2.760
—
2-3 / 4
( 2.7500)
—
—
3
9.25
4.00
1.56
2.3500
1.762
2.760 – 2.885
—
2-7 / 8
( 2.8750)
M72
( 2.8346)
3
9.25
4.00
1.56
2.4750
1.856
2.885 – 3.010
—
3
( 3.0000)
—
—
3
9.75
4.56
1.63
2.5430
1.907
3.010 – 3.135
—
3-1 / 8
( 3.1250)
—
—
3
9.75
4.56
1.63
2.6680
2.001
3.135 – 3.260
—
3-1 / 4
( 3.2500)
M80
( 3.1496)
3
10.00
4.56
1.75
2.7930
2.095
3.260 – 3.385
—
3-3 / 8
( 3.3750)
—
—
3
10.00
4.56
1.75
2.8830
2.162
3.385 – 3.510
—
3-1 / 2
( 3.5000)
—
—
3
10.25
4.94
2.00
3.0080
2.256
3.510 – 3.635
—
3-5 / 8
( 3.6250)
M90
( 3.5433)
3
10.25
4.94
2.00
3.1330
2.350
3.635 – 3.760
—
3-3 / 4
( 3.7500)
—
—
3
10.50
5.31
2.13
3.2170
2.413
3.760 – 3.885
—
3-7 / 8
( 3.8750)
—
—
3
10.50
5.31
2.13
3.3420
2.506
3.885 – 4.010
—
4
( 4.0000)
M100
( 3.9370)
3
10.75
5.31
2.25
3.4670
2.600
Reprinted with permission from United States Cutting Tool Institute( USCTI). Published by Kennametal Inc. © 2014. All rights reserved.
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