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IS0
INTERN AT I ON A L O R G A N 1Z AT I O N
FOR STAND AR D I LATI O N
IS0 RECOMMENDATION
R 887
WASHERS FOR HEXAGON BOLTS AND NUTS
METRIC SERIES
1 st EDITION
December 1968
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The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.
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ISO/R 887 -1968 (I
IS0 Recommendation R 887 Decem ber 1968
WASHERS FOR HEXAGON BOLTS AND NUTS
METRIC SERIES
I i
t 1
TABLE 1 - Washers for hexagon bolts and nuts
up to and including 39 mm thread diameter
Dimensions in millimetres
* These clearance holes conform to IS0 Recommendation R 273, Part I : Clearance holes for metric bolts
1.6 up to and including 39 mm thread diameter.
** The hexagon bolts and nuts conform to IS0 Recommendation R 272, Hexagon bolts and nuts - Widths
across flats, heights of heads, thicknesses of nuts (2nd edition, 1968).
-2-
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ISOlR 887-1968
TABLE 2 - Washers for hexagon bolts and nuts
from 42 up to and including 150 mm thread diameter
Dimensions in millimetres
i
Clearance hole*
Diameter of Thickness of For hexagon bdts and nuts**
d,
the washer the washer
fine medium thread width
a
series series d2 diameter across flats
43 45 78 7 42 65
46 48 85 7 45 70
50 52 92 8 48 75
52 80
54 56 98 8
56 85
58 62 105 9
62 66 110 9 60 90
L
66 70 115 9 64 95
70 74 120 10 68 1 O0
74 78 125 10 72 1 O5
78 82 135 10 76 110
82 86 140 12 80 115
87 91 145 12 85 120
93 96 160 12 90 130
98 101 165 12 95 135
104 107 175 14 1 O0 145
109 112 180 14 1 O5 150
114 117 185 14 110 155
119 122 200 14 115 165
124 127 210 16 120 170
129 132
220 16 125 180
134 137 230 16 130 185
c
144 147 240 18 140 200
155 158 250 18 150 210
*
These clearance holes conform to IS0 Recommendat
...