Plain washer
Standard
Old JISJIS B 1256(1963)Dimensions from the 1963 JIS. Some sizes differ from ISO in outside diameter and thickness, so use it when you have to match existing equipment or drawings. M1 to M52 are listed.ISO (new JIS)JIS B 1256(1978)Dimensions aligned with ISO. The values are from the 1978 edition and cover a wide range, M1 to M80. Some sizes differ from the current 2008 edition.Current JIS (2008)JIS B 1256(2008)Product grade A dimensions from the current JIS. Use these for new designs. The normal type is specified from M1.6 to M64 and the small type up to M36.
Notes
- New JIS is simply the name used in contrast to old JIS; it does not mean the current edition. The current edition is 2008. Use the 1963 and 1978 editions to match existing equipment or drawings.
- References
- Old JIS: JIS B 1256 (1963)
- ISO (new JIS): JIS B 1256 (1978)
- Current JIS: JIS B 1256 (2008)
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