1/8", Washers, Form B, Steel, Zinc, 50 pack.

1/8", Washers, Form B, Steel, Zinc Plated, 50 pack. Fixaball sells all sizes of BZP washers at the best internet prices, with free, first class delivery. Orders placed before 2pm are...
£1.90

1/8", Washers, Form B, Steel, Zinc Plated, 50 pack.

Fixaball sells all sizes of BZP washers at the best internet prices, with free, first class delivery.

Orders placed before 2pm are usually dispatched same day (Mon-Fri).

All sizes and materials available at the best internet prices.

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). Washers usually have an outer diameter (OD) about twice the width of their inner diameter (ID).

Washers are usually metal or plastic. High quality bolted joints require hardened steel washers to prevent the loss of pre-load due to Brinelling (permanent indentation) after the torque is applied.

Washers are important for preventing galvanic corrosion, particularly by insulating steel screws from aluminium surfaces and phosphor washers are used for high abrasion and corrosion resistance.

 

'Type' is not to be confused with 'form' (but often is). The British Standard for Metric Series Metal Washers (BS4320) written in 1968 coined the term 'form'. The forms go from A to D for Bright Metal and denote outside diameter and thickness. They can be summarised as -

 

Form A: Normal diameter, normal thickness

Form B: Normal diameter, light thickness

Form C: Large diameter, normal thickness

Form D: Large diameter, light thickness

Forms E to G relate to black metal washers.