DIN 6797J Internal Tooth Lock Washers
M2 - M18
Steel zinc platedStainless steel A2Stainless steel A4
DIN 6797J covers internal tooth lock washers — sprung teeth around the bore bite into the mating faces to resist loosening. We supply DIN 6797 washers across a range of metric sizes.
Also known as: internal shakeproof washers, internal star washers.
DIN 6797J dimensions
| Bolt Size | Inside Diameter | Outside Diameter | Tooth Height (min) | Thickness |
|---|---|---|---|---|
| M2 | 2.2mm | 4.5mm | 0.6mm | 0.3mm |
| M2.5 | 2.7mm | 5.5mm | 0.8mm | 0.4mm |
| M3 | 3.2mm | 6mm | 0.8mm | 0.4mm |
| M3.5 | 3.7mm | 7mm | 1mm | 0.5mm |
| M4 | 4.3mm | 8mm | 1.2mm | 0.5mm |
| M5 | 5.3mm | 10mm | 1.2mm | 0.6mm |
| M6 | 6.4mm | 11mm | 1.4mm | 0.7mm |
| M7 | 7.4mm | 12.5mm | 1.6mm | 0.8mm |
| M8 | 8.4mm | 15mm | 1.6mm | 0.8mm |
| M10 | 10.5mm | 18mm | 1.8mm | 0.9mm |
| M12 | 13mm | 20.5mm | 2mm | 1mm |
| M14 | 15mm | 24mm | 2mm | 1mm |
| M16 | 17mm | 26mm | 2.4mm | 1.2mm |
| M18 | 19mm | 30mm | 2.8mm | 1.4mm |
Materials & strength
Internal biting teeth
Teeth at the bore grip both fastener and joint face while staying concealed under the head.
Frequently asked
What is an internal tooth lock washer?
A lock washer whose teeth stand around the inner bore, twisted so their edges bite into the bolt head and joint face as the fixing is tightened. The teeth sit hidden under the head, giving a tidier appearance than external patterns.
Need DIN 6797J in a non-standard size or material?
Send us your drawing — specials quoted within 24 hours.