A close-coiled helical extension spring, with ends fastened together to form a circle, designed to impose compression stresses toward the center of the circle thus formed when uniformly expanded.
NSN 5960-01-525-1690
NSN 5950-00-221-2388
NSN 5835-00-880-6477
NSN 6135-00-351-8606
NSN 5950-00-153-1959
NSN 5985-01-495-9662
NSN 7035-01-462-5766
NSN 6135-00-488-4478
NSN 5895-00-197-2852
NSN 6610-01-265-0999
NSN 5905-01-413-7107
NSN 5965-00-482-7945