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 5935-00-235-2545
NSN 6650-01-290-0454
NSN 6320-01-029-4220
NSN 5990-00-269-2226
NSN 6320-01-262-8642
NSN 5895-00-581-3969
NSN 6645-01-235-1601
NSN 6150-00-596-9882
NSN 6130-01-336-3627
NSN 5945-01-090-0890
NSN 6685-00-559-1326
NSN 6145-01-259-0308