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Metric Round Head Ribbed Neck Bolts

IFI 544 - 1998

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美标IFI 544 - 1998 IFI544 544IFI Metric Round Head Ribbed Neck Bolts
Thread Size
d
M5 M6 M8 M10 M12 M14
P Pitch
ds max
min
R Ref.
k max
min
c max
min
dk max
M tol. ±0.8 L≤22.23
L≥25.4
n
d1 min
L1 L≤22.23
L=25.4~28.58
L≥31.75
r max
b L≤125
125<L≤200
L>200
0.8 1 1.25 1.5 1.75 2
5.48 6.48 8.58 10.58 12.7 14.2
4.52 5.52 7.42 9.42 11.3 13.3
8.8 10.7 12.5 15.5 19 21.9
3.1 3.6 4.8 5.8 6.8 7.9
2.5 3 4 5 6 7
1.8 1.9 2.2 2.5 2.8 3.3
1 1.1 1.2 1.5 1.8 2.1
11.8 14.2 18 22.3 26.6 30.5
0.8 0.8 0.8 0.8 0.8 0.8
1.6 1.6 1.6 1.6 1.6 1.6
9 10 12 12 14 16
5.5 6.7 8.7 10.8 12.8 14.9
6.4 6.4 6.4 6.4 6.4 6.4
10.4 10.4 10.4 10.4 10.4 10.4
15.1 15.1 15.1 15.1 15.1 15.1
0.8 0.8 0.8 0.8 0.8 0.8
16 18 22 26 30 34
22 24 28 32 36 40
35 37 41 45 49 53
①,As the length value is not listed in the original document, the L value in the table is for reference only.