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 5910-00-932-0629
NSN 6650-01-445-9653
NSN 5930-01-032-0788
NSN 5950-01-554-4178
NSN 4140-01-454-6421
NSN 6105-00-156-9084
NSN 5945-01-035-5445
NSN 6110-01-260-2078
NSN 5965-01-230-2351
NSN 5998-00-596-9568
NSN 5930-01-485-3196
NSN 5975-00-636-4910