Description
M5, M6, M8, M10, M12, M16, M20, M24, Washers, Form B, Zinc Plated, BZP, BS4320
Fixaball, sell all sizes of Form B (thinner than regular form A), BZP, flat washers.
A washer has multiple purposes depending on its shape, form and material. Generally speaking, a washer is used to:
- protect the surface of fastened materials,
- spread the load/ pressure at the hold points of fastened materials,
- assist with tightening and loosening of a fastener,
- control the spacing of connecting components
Orders placed before 2pm are usually dispatched same day (Mon-Fri).
Standard, Free Delivery is Royal Mail, 2nd Class (2-5 days, most likely 2 days). For a faster delivery time, select 1st class or courier at checkout.
Please make your size and pack quantity selection from the drop down menus.
Washers – Form B Dimensions for Flat Washers
Metric Form B Flat Washer Stainless-Steel BS4320
| D | d1 | d2 | d3 |
|---|---|---|---|
| M1.0 | 1.1000 | 2.5000 | – |
| M1.2 | 1.3000 | 3.0000 | – |
| M1.4 | 1.5000 | 3.0000 | – |
| M1.6 | 1.7000 | 4.0000 | – |
| M2 | 2.2000 | 5.0000 | – |
| M2.2 | 2.4000 | 5.0000 | – |
| M2.5 | 2.7000 | 6.5000 | – |
| M3 | 3.6200 | 7.0000 | – |
| M3.5 | 3.7000 | 7.0000 | – |
| M4 | 4.3000 | 9.0000 | – |
| M4.5 | 4.8000 | 9.0000 | – |
| M5 | 5.3000 | 10.0000 | – |
| M6 | 6.4000 | 12.5000 | 0.8000 |
| M7 | 7.4000 | 14.0000 | 0.8000 |
| M8 | 8.4000 | 17.0000 | 1.0000 |
| M10 | 10.5000 | 21.0000 | 1.2500 |
| M12 | 13.0000 | 24.0000 | 1.6000 |
| M14 | 15.0000 | 28.0000 | 1.6000 |
| M16 | 17.0000 | 30.0000 | 2.0000 |
| M18 | 19.0000 | 34.0000 | 2.0000 |
| M20 | 21.0000 | 37.0000 | 2.0000 |
| M22 | 23.0000 | 39.0000 | 2.0000 |
| M24 | 25.0000 | 44.0000 | 2.5000 |
| M27 | 28.0000 | 50.0000 | 2.5000 |
| M30 | 31.0000 | 56.0000 | 2.5000 |
| M33 | 34.0000 | 60.0000 | 3.0000 |
| M36 | 37.0000 | 66.0000 | 3.0000 |
| M39 | 40.0000 | 72.0000 | 3.0000 |
Additional Information
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.
Image is for illustrative purposes only.
