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 6150-01-017-4654
NSN 6320-01-157-9076
NSN 5945-01-653-3201
NSN 2925-01-123-5856
NSN 4140-00-329-3854
NSN 5985-01-143-5375
NSN 6220-01-499-4750
NSN 6145-00-588-0794
NSN 5905-01-631-5804
NSN 2925-00-147-8150
NSN 5905-01-226-3569
NSN 6145-00-570-0516