Andrews Fasteners Ltd

AndFast Malaysia SDN BHD

The Fasteners Specialist

+44 (0) 113 246 9992

Basic dimensions for Form A Washers (BS 4320 / DIN 125 Part 1)

BS 4320 / DIN 125-1: Basic dimensions Form A washers for selected sizes

Nominal
size
Inside diameter (d1)Outside diameter (d2)Thickness (s)
min.BS 4320
max.
DIN 125-1
max.
BS4320
min.
BS 4320
max.
DIN 125-1
min.
DIN 125-1
max.
min.max.
M55.35.55.489.7109.64100.91.1
M66.46.76.6212.112.511.57121.41.8
M88.48.78.6216.61715.57161.41.8
M1010.510.910.7720.52119.48201.82.2
M1213.013.413.2723.52423.48242.32.7
M1617.017.417.2729.53029.48302.73.3
M202121.521.3336.23736.38372.73.3
M242525.525.3343.24443.38443.74.3