DIN 127B Spring Washers
DIN 127B covers single coil rectangular section spring lock washers — the standard spring washer of general engineering. We supply DIN 127B spring washers across a wide range of metric sizes.
Also known as: rectangular section spring washers, single coil spring washers, spring locking washers.
DIN 127B dimensions
| Bolt Size | Inside Diameter | Outside Diameter | Thickness |
|---|---|---|---|
| M2 | 2.1mm | 4.4mm | 0.5mm |
| M2.5 | 2.6mm | 5.1mm | 0.6mm |
| M3 | 3.1mm | 6.2mm | 0.8mm |
| M4 | 4.1mm | 7.6mm | 0.9mm |
| M5 | 5.1mm | 9.2mm | 1.2mm |
| M6 | 6.1mm | 11.8mm | 1.6mm |
| M8 | 8.1mm | 14.8mm | 2.0mm |
| M10 | 10.2mm | 18.1mm | 2.2mm |
| M12 | 12.2mm | 21.1mm | 2.5mm |
| M14 | 14.2mm | 24.1mm | 3.0mm |
| M16 | 16.2mm | 27.4mm | 3.5mm |
| M20 | 20.2mm | 33.6mm | 4.0mm |
| M22 | 22.5mm | 35.9mm | 4.0mm |
| M24 | 24.5mm | 40.0mm | 5.0mm |
| M27 | 27.5mm | 43.0mm | 5.0mm |
| M30 | 30.5mm | 48.2mm | 6.0mm |
| M33 | 33.5mm | 55.2mm | 6.0mm |
| M36 | 36.5mm | 58.2mm | 6.0mm |
| M39 | 39.5mm | 61.2mm | 6.0mm |
| M42 | 42.5mm | 68.2mm | 7.0mm |
| M45 | 45.5mm | 71.2mm | 7.0mm |
| M48 | 49mm | 75mm | 7.0mm |
| M52 | 53mm | 83mm | 8.0mm |
| M56 | 57mm | 87mm | 8.0mm |
| M60 | 61mm | 91mm | 8.0mm |
| M64 | 65mm | 95mm | 8.0mm |
| M68 | 69mm | 99mm | 8.0mm |
| M72 | 73mm | 103mm | 8.0mm |
| M76 | 77mm | 107mm | 8.0mm |
Materials & strength
Single coil locking
The rectangular section coil flattens under load, maintaining joint tension to resist loosening.
Spring steel & stainless
Zinc plated spring steel covers general duties; stainless suits corrosive environments.
What is a DIN 127B spring washer?
The standard single coil spring lock washer with a rectangular wire section. Fitted under a nut or bolt head, the flattened coil keeps tension in the joint and helps resist loosening under vibration.
What is the difference between DIN 127A and DIN 127B?
Form A and form B differ in the coil's end form and section detail; B is the pattern in common trade use. If a drawing specifies one form, match it.
What materials are spring washers available in?
Spring washers are available in zinc plated spring steel and stainless steel across a wide range of metric sizes.
Need DIN 127B in a non-standard size or material?
Send us your drawing — specials quoted within 24 hours.