BS 4464 - 1969 Metric Spring Lock Washers - Type BP


Unit: mm
Size
(M3.5) M4 M5 M6 M8 M10 M12 (M14) M16 (M18) M20 (M22) M24
d max
min
n max
min
h Nominal Size
max
min
k
3.8 4.35 5.35 6.4 8.55 10.6 12.6 14.7 16.9 19 21.1 23.3 25.3
3.6 4.1 5.1 6.1 8.2 10.2 12.2 14.2 16.3 18.3 20.3 22.4 24.4
1.4 1.6 1.9 2.65 3.15 3.7 4.2 4.7 5.2 5.2 6.2 6.2 7.25
1.2 1.4 1.7 2.35 2.85 3.3 3.8 4.3 4.8 4.8 5.8 5.8 6.75
0.8 0.9 1.2 1.6 2 2.2 2.5 3 3.5 3.5 4 4 5
0.9 1 1.3 1.7 2.1 2.35 2.65 3.15 3.7 3.7 4.2 4.2 5.2
0.7 0.8 1.1 1.5 1.9 2.05 2.35 2.85 3.3 3.3 3.8 3.8 4.8
0.15 0.15 0.15 0.2 0.3 0.3 0.4 0.4 0.4 0.4 0.4 0.4 0.5
Size
(M27) M30 (M33) M36 (M39) M42 (M45) M48 (M52) M56 (M60) M64 (M68)
d max
min
n max
min
h Nominal Size
max
min
k
28.5 31.5 34.6 37.6 40.8 43.8 46.8 50 54.1 58.1 62.3 66.3 70.5
27.5 30.5 33.5 36.5 39.6 42.6 45.6 48.8 52.8 56.8 60.9 64.9 69
7.25 8.25 10.25 10.25 10.25 12.25 12.25 12.25 14.25 14.25 14.25 14.25 14.25
6.75 7.75 9.75 9.75 9.75 11.75 11.75 11.75 13.75 13.75 13.75 13.75 13.75
5 6 6 6 6 7 7 7 8 8 8 8 8
5.2 6.25 6.25 6.25 6.25 7.25 7.25 7.25 8.25 8.25 8.25 8.25 8.25
4.8 5.75 5.75 5.75 5.75 6.75 6.75 6.75 7.75 7.75 7.75 7.75 7.75
0.5 0.8 0.8 0.8 0.8 0.8 0.8 0.8 1 1 1 1 1
①,H=(2h+2k)±15%
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