What are these?

[Old Salt]

Anybody know what these are called?

?

 

[Nozzle]

Some kind of torsion spring, I couldn't tell you more.

Nozzle

 

[JohnD]

when you squeeze the two ends together, the central diameter gets bigger, and tightens when released

so they could be to grip on a rod or spindle

where did you find them?

 

[foxhole]

Spring Hose clamp/clip.

 

[JohnD]

Hose clamp/clip.

oh yes

never seen them with so many turns

 

[Old Salt]

when you squeeze the two ends together, the central diameter gets bigger, and tightens when released

so they could be to grip on a rod or spindle

where did you find them?

These particular items are used for radio control sail boats to tighten the sails.
I want to avoid the £2 each as you can use 5 for each sail and could have up to 4 sails

 

[JohnD]

I have seen spring merchants on ebay, though never looked for that type before

I bet the factory turns them out at 50p a hundred.