Nominal Thread ds k s e dk' r da Z A-B E F
Coarse Nominal Measurement Tolerance Nominal Measurement Tolerance Nominal Measurement Tolerance Approx. Approx. Min Max Approx. Max Max Max
M24 24 0
-0.35		 15 ±0.35 36 0
-1		 41.6 34 0.8 26.4 3 1.2 1degree 2degrees
(M27) 27 17 41 47.3 39 1 30.4 3 1.3
M30 30 19 ±0.4 46 53.1 44 1 33.4 3.5 1.5
(M33) 33 0
-0.4		 21 50 57.7 48 1 36.4 3.5 1.6
M36 36 23 55 0
-1.2		 63.5 53 1 39.4 4 1.8
(M39) 39 25 60 69.3 57 1 42.4 4 2
M42 42 26 65 75 62 1.2 45.6 4.5 2.1
(M45) 45 28 70 80.8 67 1.2 48.6 4.5 2.3
M48 48 30 75 86.5 72 1.6 52.6 5 2.4
(M52) 52 0
-0.45		 33 ±0.5 80 92.4 77 1.6 56.6 5 2.6
M56 56 35 85 0
-1.4		 98.1 82 2 63 5.5 2.8
(M60) 60 38 90 104 87 2 67 5.5 3
M64 64 40 95 110 92 2 71 6 3

Nominal Thread(d) M24 (M27) M30 (M33) M36 (M39) M42 (M45) M48 (M52) M56 (M60) M64 Nominal Thread(d)
Nominal Length(l) Length of Threaded Section(b) Nominal Length(l)
30 54                         30
40 60 66 72                   40
50 78 84               50
60 90 96 102         60
70         70
80         80
90         90
100         100
110         110
120         120
130 60 66 72 78 84 90 96 102 108 116 124 132 140 130
140 140
150 150
160 160
170 170
180 180
190 190
200 200
210   210
220   79 85 91 97 103 109 115 121 129 137 145 153 220
230   230
240   240
250             250
260             260
270             270
280             280
290             290
300             300
320             320
340             340
360                   360
380                   380
400                   400

Tolerance of I I Class
Upper/Middle Coarse
Nominal Diameter 24 Nominal Diameter 27-64 Nominal Diameter 24-52
Less than 50 ±0.5 ±0.8 ±1
More than 50, less than 120 ±0.7 ±1.1 ±1.4
More than 120, less than 250 ±0.9 ±1.4 ±1.8
More than 250 ±1.2 ±1.8 ±2.3
b Classification b Tolerance
Less than 30 Upper/Middle +3
Coarse +5
More than 30, less than 50 Upper/Middle +4
Coarse +6
More than 50, less than 80 Upper/Middle +5
Coarse +8
More than 80, less than 120 Upper/Middle +7
Coarse +10
More than 120 Upper/Middle +10
Coarse +13

Note: Lower minimum tolerance is 0