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 5930-01-634-0659
NSN 5965-01-359-5501
NSN 5895-00-127-6443
NSN 5996-01-263-7934
NSN 5950-01-074-5405
NSN 5935-00-959-6481
NSN 5950-01-168-0174
NSN 6105-00-705-7629
NSN 5935-01-340-2203
NSN 2925-01-298-2674
NSN 5945-00-271-7380
NSN 5920-01-620-8490