Fundamental deviations and upper limits of coating thicknesses for assemblies with nuts tapped oversize
Pitch
Nominal
thread
diameter
Fundamental deviation
Minimum clearance and maximum coating thickness for thread combinations
P
mm
d
mm
Internal
thread
External
thread
AZ/h
AZ/g
AX/h
AX/g
AZ
µm
AX
µm
h
µm
g
µm
Minimum
clearance

µm
Maximum
coating
thickness

µm
Minimum
clearance

µm
Maximum
coating
thickness

µm
Minimum
clearance

µm
Maximum
coating
thickness

µm
Minimum
clearance

µm
Maximum
coating
thickness

µm
1.25
8
+325
+255
0
-28
325
81
353
88
255
64
283
71
1.5
10
+330
+310
0
-32
330
83
362
91
310
78
342
86
1.75
12
+335
+365
0
-34
335
84
369
92
365
91
399
100
2
16 (14)
+340
+420
0
-38
340
85
378
95
420
105
458
115
2.5
20 (18, 22)
+350
+530
0
-42
350
88
392
98
530
133
572
143
3
24 (27)
+360
+640
0
-48
360
90
408
102
640
160
688
172
3.5
30 (33)
+370
+750
0
-53
370
93
423
106
750
188
803
201
4
36 (39)
+380
+860
0
-60
380
95
440
110
860
215
920
230
4.5
42 (45)
+390
+970
0
-63
390
98
453
113
970
243
1033
258
5
48 (52)
+400
+1080
0
-71
400
100
471
118
1080
270
1151
288
5.5
56 (60)
+410
+1190
0
-75
410
103
485
121
1190
398
1265
316
6
64
+420
+1300
0
-80
420
105
500
125
1300
325
1380
345




Fundamental deviations and upper limits of coating thicknesses
for assemblies with bolts and screws with undersized threads
Pitch
Nominal
thread
diameter
Fundamental deviation
Minimum clearance and maximum coating thickness for thread combinations
P
mm
d
mm
External
thread
Internal
thread
az/h
az/g
az
µm
H
µm
G
µm
Minimum
clearance

µm
Maximum
coating
thickness

µm
Minimum
clearance

µm
Maximum
coating
thickness

µm
1.25
8
-325
0
+28
325
81
353
88
1.5
10
-330
0
+32
330
83
362
91
1.75
12
-335
0
+34
335
84
369
92
2
16 (14)
-340
0
+38
340
85
378
95
2.5
20 (18, 22)
-350
0
+42
350
88
392
98
3
24 (27)
-360
0
+48
360
90
408
102
3.5
30 (33)
-370
0
+53
370
93
423
106
4
36 (39)
-380
0
+60
380
95
440
110
4.5
42 (45)
-390
0
+63
390
98
453
113
5
48 (52)
-400
0
+71
400
100
471
118
5.5
56 (60)
-410
0
+75
410
103
485
121
6
64
-420
0
+80
420
105
500
125

Tags: ISO 10684 Hot Dip Galvanized HDG