forgings
The Standard & Non-Standard Specialists
www.brooksforgings.co.uk
INDUSTRIAL CATALOGUE
BS 4190 - HEXAGON BOLTS - METRIC
BFF 1
- TO BS 4190
BS 4190 - HEXAGON BOLTS - METRIC
STANDARD THREAD LENGTHS
WASHER FACE ON REQUEST
THREAD
DIA
A
PITCH OF
THREAD
Coarse
Pitch
Series
DIA OF SHANK
UNTHREADED
WIDTH ACROSS
FLATS
MIN
MAX
MIN
0.8
4.52
5.48
7.64
M8
1.25
7.42
8.58
12.57
M12
1.75
11.30
12.70
18.48
M20
2.5
19.16
M24
3
mm
M5
M6
M10
M16
(M22)
1.5
2
2.5
3
3.5
M36
4
(M39)
3.5
4
M42
4.5
M48
5
(M45)
(M52)
4.5
5
M56
5.5
M64
6
(M60)
(M68)
mm
1
M30
(M33)
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Length of thread C
Over 125mm up to and
including 200mm
2A + 12mm
Up to and including 125mm
2A + 6mm
Over 200mm
(M27)
11
Normal length of bolt B
5.5
6
5.52
mm
6.48
9.42
10.58
15.30
16.70
21.16
23.16
26.16
29.16
32.00
35.00
38.00
41.00
44.00
47.00
50.80
54.80
58.80
62.80
66.80
MATERIAL
GRADE 4.6, 5.6, 6.9
STAINLESS STEELS
AVAILABLE IN BS3692
GRADES 8.8, 10.9, 12.9
tel. +44 (0)1384 563356
20.84
22.84
24.84
27.84
30.84
34.00
37.00
40.00
43.00
46.00
49.00
53.20
57.20
61.20
65.20
69.20
mm
E
MAX
MIN
8
8.63
mm
mm
F
9.2
3.13
3.88
0.35
15.0
5.13
5.88
0.80
10.89
11.5
16.57
17
18.72
19.6
23.16
29.16
31.00
35.00
40.00
45.00
49.00
53.80
58.80
63.80
68.80
73.80
78.80
83.60
88.60
93.60
98.60
19
24
30
32
36
41
46
50
55
60
65
70
75
80
85
14.20
20.88
26.17
32.95
35.03
39.55
45.20
50.85
55.37
60.79
66.44
72.09
77.74
83.39
89.04
94.47
21.9
27.7
6.55
7.55
53.1
57.7
63.5
69.3
75.1
80.8
86.6
92.4
98.1
100
111.42
115.5
109.7
mm
4.38
7.45
8.45
10.45
13.10
14.90
14.10
47.3
MAX
9.55
41.6
36.9
103.9
fax. +44 (0)1384 563357
3.63
12.10
100.12
105.77
mm
34.6
90
95
D
RADIUS
UNDER
HEAD
MIN
mm
10
13
HEIGHT OF
HEAD
MAX
9.64
FINISH
SELF COLOUR
GALVANISED
ELECTROPLATED
SHERARDISED
PTFE COATING
|
WIDTH ACROSS
CORNERS
2A + 25mm
16.10
17.95
19.95
21.95
23.95
24.95
26.95
28.95
31.75
33.75
36.75
38.75
41.75
13.90
15.90
17.90
20.05
22.05
24.05
26.05
27.05
29.05
31.05
34.25
36.25
39.25
41.25
44.25
mm
0.40
0.80
1.25
1.25
1.78
1.78
1.78
2.28
2.28
2.28
2.70
2.70
2.80
3.30
3.80
4.70
4.90
4.90
4.90
4.90
NON STANDARD
THREAD LENGTH AVAILABLE
LENGTHS UP TO 3000MM
( ) = DENOTES NON PREFERRED SIZES
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