M12 x 20mm Reduced Diameter Flat Washers (DIN 433) - Black Marine Stainless Steel (A4) Description
The M12 x 20mm Reduced Diameter Flat Washers (DIN 433) - Black Marine Stainless Steel (A4) has the following features:
- DIN 433 Manufacturing Standard
- 13mm Internal Diameter (ID)
- 20mm External Diameter (OD)
- 2mm Thickness (T)
- Marine Stainless Steel (A4) Material
- 316 Marine Grade Stainless Steel (A4) Material Specification
- Matte Black Finish
- Metric Metric or Imperial?
- +/-0.2mm Thickness (T) Tolerance
- M12 (12mm) For Use With Thread Size
- +0/-0.52mm External Diameter (OD) Tolerance
- +0.27/-0mm Internal Diameter (ID) Tolerance
Discover more about the Metric Flat Washers range.
Metric Flat Washers, part of Accu's Stainless Steel Washer & Spacers range, are designed primarily to enhance the load-bearing capabilities of a threaded fastener. These components are compatible with a wide range of Precision Screws. Flat Washers are versatile components with a variety of uses, including spacing, pre-load indication, and wear-protection.
Flat Washers are available in several variants with varying diameters and thicknesses. The most commonly used washers are forms A, B and C, with more specialised variants such as Penny Washers also available. Flat washer variants range from those with small external diameters and thicknesses, to very large washers with large external diameters.
Where a flat surface is not required, components such as Countersunk Washers or Spring Washers may be preferable.
Materials
Accu's standard range of Metric Flat Washers is manufactured from A2, A4 and Bumax Stainless Steel, with a blackened finish available on all stainless steel options.
All Stainless Steel Washers are resistant to tarnishing and corrosion, but A4 (316) Stainless Steel is specifically designed for use in marine environments.
Flat Washers can also be manufactured from a variety of specialist materials, including Aluminium, Brass, Phosphor Bronze, Nylon, PEEK, Polycetal, Reny, Polyphenylene, Polycarbonate and Titanium. Fibre and Rubber Flat Washers are intended to be pliable for sealing purposes.
Metric Flat Washer Sizes
Accu's Metric Flat Washers are compatible with thread sizes ranging from M1 to M56. This category includes only metric sizes – Imperial Flat Washers are available separately.