Related Resources: hardware
Grade 4.6 Countersunk Bolt Capacities Table
Engineering ISO Metric Hardware Design Data
Engineering ANSI Hardware Design Data
See Explanatory notes given below table. BS 5950-1: 2000 BS 4190: 2001, BS 4933
Countersunk Bolt Loading Capacities Grade 4.6 material S275 Table
Non-Preloaded Countersunk Bolts
Grade 4.6 Countersunk Bolts material S275
Diameter
of Bolt mm |
Tensile
Stress Area At mm² |
Tension
Capacity |
Shear
Capacity |
Bearing Capacity in kN (Minimum of Pbb and Pbs )
End distance equal to 2 x bolt diameter Thickness in mm of material passed through |
||||||||||||
Nominal
0.8 At pt P nom kN |
Exact At pt Pt kN |
Single
Shear Ps kN |
Double
Shear 2 Ps kN |
5
|
6
|
7
|
8
|
9
|
10
|
12
|
15
|
20
|
25
|
30
|
||
12
|
84.3
|
16.2
|
20.2
|
13.5
|
27.0
|
11.0
|
16.6
|
22.1
|
27.6
|
33.1
|
38.6
|
49.7
|
66.2
|
93.8
|
121
|
149
|
16
|
157
|
30.1
|
37.7
|
25.1
|
50.2
|
7.36
|
14.7
|
22.1
|
29.4
|
36.8
|
44.2
|
58.9
|
81.0
|
118
|
155
|
191
|
20
|
245
|
47.0
|
58.8
|
39.2
|
78.4
|
0
|
9.20
|
18.4
|
27.6
|
36.8
|
46.0
|
64.4
|
92.0
|
138
|
184
|
230
|
22
|
303
|
58.2
|
72.7
|
48.5
|
97.0
|
0
|
5.06
|
15.2
|
25.3
|
35.4
|
45.5
|
65.8
|
96.1
|
147
|
197
|
248
|
24
|
353
|
67.8
|
84.7
|
56.5
|
113
|
0
|
0
|
11.0
|
22.1
|
33.1
|
44.2
|
66.2
|
99.4
|
155
|
210
|
265
|
27
|
459
|
88.1
|
110
|
73.4
|
147
|
0
|
0
|
3.11
|
15.5
|
27.9
|
40.4
|
65.2
|
102
|
165
|
227
|
289
|
30
|
561
|
108
|
135
|
89.8
|
180
|
0
|
0
|
0
|
6.90
|
20.7
|
34.5
|
62.1
|
104
|
173
|
242
|
311
|
The tensile stress area (At ) is obtained from standards
The tension capacity of the bolt is given by:
Pnom = 0.8ptAt Nominal
Pt = ptAt Exact
Where:
pt is the tension strength of the bolt.
The shear capacity of the bolt is given by
PS = ps As
where:
ps is the shear strength of the bolt
As is the shear area of the bolt.
In the table, As has been taken as equal to At .
The shear capacity given in the tables must be reduced for large packings, large grip lengths, kidney shaped slots or long joints when applicable.
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