Yep.
'A' washer? Only one?
Anyway, crimp it good on your new springs, insert gently.
One of those 'you never know' sort of things. You put it on the spring, put the spring in. Did it stay on? Pull the spring out to check. It's still there. Put the spring back in. Did it stay on? Pull the spring.........
Yast yoking. As long as you crimp it on pretty good, you should be ok. It's not too hard, though to THINK it's secure, and not too much of a bump later, it will fall off! A nominal amount of caution will suffice.