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Bolt Standards


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Metric high tensile, precision hexagon head bolts, screws and hexagon nuts.
ISO metric course pitch series threads 6g.
Property class 8.8 to Australian standards, bolts and screws
AS1110-2000 nuts AS 1112-200

Metric
Nominal Bolt Size
Pitch
Shank Dia
Width Across Flats
Head thickness
Nut Thickness
Course
Fine
Max
Min
Max
Min
Max
Min
Max
Min
M6
1.00
0.75
6
5.82
10
9.78
4.15
3.85
5.2
4.90
M8
1.25
1.00
8
7.78
13
12.73
5.45
5.15
6.8
6.44
M10
1.50
1.25
10
9.78
16
15.73
6.58
6.22
8.4
8.04
M12
1.75
1.25
12
11.73
18
17.73
7.68
7.32
10.80
10.37
M14
2.00
1.50
14
13.73
21
20.67
8.98
8.62
12.8
12.10
M16
2.00
1.50
16
15.73
24
23.67
10.18
9.82
14.8
14.01
M20
2.50
1.50
20
19.67
30
29.67
12.715
12.85
18.00
16.90
M24
3.00
2.00
24
23.67
36
35.38
15.215
14.785
21.50
20.20

Unified high tensile hexagon bolts, screws and hexagon nuts, inch series, UNC and UNF threads to Australian standard 2465-1999 grade 5 - grade 8 (equivalent to dimensions of ANSI B18.2.1)

Imperial
Nominal Bolt Size
Threads per inch
Shank Dia
Width Across Flats
Head thickness
Nut Thickness
UNC
UNF
Max
Min
Max
Min
Max
Min
Max
Min
1/4
20
28
0.250
0.245
0.438
0.428
0.163
0.150
0.226
0.212
5/16
18
24
0.3125
0.3065
0.500
0.489
0.211
0.195
0.273
0.258
3/8
16
24
0.375
0.369
0.562
0.551
0.243
0.226
0.337
0.320
7/16
14
20
0.4375
0.4305
0.625
0.612
0.291
0.272
0.385
0.365
1/2
13
20
0.500
0.493
0.750
0.736
0.323
0.302
0.448
0.427
5/8
11
18
0.625
0.617
0.938
0.922
0.403
0.378
0.559
0.535
3/4
10
16
0.750
0.741
1.125
1.100
0.483
0.455
0.665
0.617
7/8
9
14
0.875
0.866
1.312
1.285
0.563
0.531
0.776
0.724
1
8
14
1.000
0.990
1.500
1.469
0.627
0.591
0.887
0.831

Bremick Fasteners
Information provided as a guide by Bremick Fasteners

 
 

 
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