Washers
Stamped washers
Brass
(Plain)
Metric: M1.6 to M20
Steel
(Plain – chamfered)
Metric: M1.6 to M39 – M5 to M30
Stainless steel
(Plain)
Metric: M2.5 to M30
Black
(Plain)
Metric: M5 to M48
Spring washers single coil
Steel
(Square section – rectangular section)
Metric: M3 to M24 – M2 to M24
Stainless steel
(Rectangular section)
Metric: M2.5 to M12
Steel
(Trapezoidal section)
Metric: N0.2 to No.12
Fractional: 1/4″ to 1″
Toothed lockwashers
Steel
(External teeth – internal teeth)
Metric: M2 to M16 – M3 to M16
BA: 7BA to 0BA – 10BA to 0BA
Fractional: 3/16″ to 1″ – 1/8″ to 1 1/4″
Phosphor bronze
(External teeth – internal teeth)
Metric: M4 to M20 – M3 to M20
BA: 6BA to 0BA – 8BA to 0BA
Fractional: 1/8″ to 3/4″ – 3/16″ to 3/4″
Stainless steel
(Internal teeth)
Metric: M2.5 to M12
BSW: 3/16″ to 1″
Taper washers D shaped
Malleable iron
3 and 6 1/2 – 3/16″ to 1 1/2″
5 and 8 – 1/4″ to 1 1/2″
Square plate washers
Steel
1 1/2″ to 4″ square
1/8″ to 3/8″ thick
5° and 8° square taper
Through hardened
Metric: M16 to M24
Flat round and 3° square taper
Through hardened
Metric: M16 to M30
Crinkle washers
Berrylium copper
Metric: M1.6 to M20
BA: 10BA to 0BA
Fractional: 1/4″ to 3/4″
Coronet load indicating washers
Metric: M16 to M30
