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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)M12M16M20M22M24M27M30M36
Internal diameter
(d1)
12.1-12.3516.1-16.3520.1-20.4022.3-22.6024.2-24.5027.2-27.5530.2-30.5536.2-36.55
External diameter
(d2)
22.7-2427.7-2934.4-3637.4-3941.4-4346.4-4850.1-5260.1-62
Thickness
(h)
2.7-4.33.7-4.33.7-4.33.7-4.33.7-4.34.4-5.64.4-5.65.4-6.6

Dimensions of bolt face washers (HB)

Size (d)M12M16M20M22M24M27M30M36
Internal diameter
(d1)
13-13.2717-17.2721-21.3323-23.3325-25.3328-28.5331-31.6237-37.62
External diameter
(d2)
23.48-2429.48-3036.38-3738.38-3943.38-4449-5054.80-5664.80-66
Thickness
(h)
2.7-4.33.7-4.33.7-4.33.7-4.33.7-4.34.4-5.64.4-5.65.4-6.6
Inside chamfer
(c)
1.6-1.91.6-1.92.0-2.52.0-2.52.0-2.52.5-3.02.5-3.02.5-3.0
Outside chamfer
(e)
0.50-1.00.75-1.500.75-1.500.75-1.500.75-1.501.0-2.01.0-2.01.25-2.50
Dimensions in millimeters