A washer is a thin plate (typically disk-shaped) with a hole (typically in the middle) that is normally used to distribute the load of a threaded fastener, such as a screw or nut.
Other uses are as a spacer, spring (belleville washer, wave washer), wear pad, preload indicating device, locking device, and to reduce vibration (rubber washer).
Flat washers are used to increase the bearing surface of a nut or fastener's head thus spreading the clamping force over a larger area.
They can be useful when working with soft materials and oversized or irregular shaped holes.
Flat washers are also known as plain washers.
SIze: M6-M48
other sizes are available upon request
OD: as per size
Thickness: as per size
Material: steel
Grade: 4.8/6.8/8.8/10.9/12.9
Finish: black oxide/zinc plated (galvanized)/hot dip galvanized (HDG)
other kinds of surface treatment are available upon request
Technical info: DIN 9250
