EN 14399-9: Basic dimensions for Nut face and bolt face washers - Andrews Fasteners CE Approved Bolts, Nuts & Washers

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EN 14399-9: Basic dimensions for Nut face and bolt face washers image

EN 14399-9: Basic dimensions for Nut face and bolt face washers

Nut face washers and bolt face washers – basic dimensions

According to EN 14399-9:2018

Dimensions of nut face washers (NH)

Size (d) M12 M16 M20 M22 M24 M27 M30 M36
Internal diameter
(d1)
12.1-12.35 16.1-16.35 20.1-20.40 22.3-22.60 24.2-24.50 27.2-27.55 30.2-30.55 36.2-36.55
External diameter
(d2)
22.7-24 27.7-29 34.4-36 37.4-39 41.4-43 46.4-48 50.1-52 60.1-62
Thickness
(h)
2.7-4.3 3.7-4.3 3.7-4.3 3.7-4.3 3.7-4.3 4.4-5.6 4.4-5.6 5.4-6.6

Dimensions of bolt face washers (HB)

Size (d) M12 M16 M20 M22 M24 M27 M30 M36
Internal diameter
(d1)
13-13.27 17-17.27 21-21.33 23-23.33 25-25.33 28-28.53 31-31.62 37-37.62
External diameter
(d2)
23.48-24 29.48-30 36.38-37 38.38-39 43.38-44 49-50 54.80-56 64.80-66
Thickness
(h)
2.7-4.3 3.7-4.3 3.7-4.3 3.7-4.3 3.7-4.3 4.4-5.6 4.4-5.6 5.4-6.6
Inside chamfer
(c)
1.6-1.9 1.6-1.9 2.0-2.5 2.0-2.5 2.0-2.5 2.5-3.0 2.5-3.0 2.5-3.0
Outside chamfer
(e)
0.50-1.0 0.75-1.50 0.75-1.50 0.75-1.50 0.75-1.50 1.0-2.0 1.0-2.0 1.25-2.50
Dimensions in millimeters