Help with icons

[Titan X]

I have a few icons I found in one of my many random O boxes in the closet. Not sure what they are. Any help would be appreciated.

 

[Markman69]

The one with the white middle on second pic is a flak jacket.

the others couod be crankshaft, or gascan. Fuel cell Wouod be bigger

 

[Titan X]

Thanks for help Marcus

 

[Titan X]

I do have 2 different red. Maybe bigger sets are fuel cell