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 5925-01-363-1365
NSN 6110-01-541-0527
NSN 5905-01-541-4592
NSN 5998-00-488-5698
NSN 5960-00-777-4320
NSN 5975-01-524-9334
NSN 5945-00-706-8172
NSN 6105-01-614-3120
NSN 5915-01-657-6931
NSN 5835-00-562-7524
NSN 5945-00-185-6609
NSN 4140-01-595-0741