Finnish field bottle cap rubber gasket.
These are unused Finnish army surplus gaskets.
Field Bottle Instructions
For a complete M/36 field bottle, you need
How to correctly use the field bottle cap bolt set
- Put the field bottle cap gasket inside the cap
- Push the bolt through the holes on the gasket and cap from the inside of the cap
- Tighten the bolt to the cap with one nut
- Put the bolt through the rivet hole of the field bottle cover strap
- Screw the second nut on to the bolt
- Screw the end cap to the bolt as far as it goes
- Tighten the second nut back towards the end cap to hold it still
- The field bottle cover strap should be free to rotate around the bolt