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 6240-01-530-7485
NSN 6145-01-236-6251
NSN 5945-00-825-3206
NSN 5960-01-370-4285
NSN 6645-01-195-0561
NSN 5930-01-521-5738
NSN 5996-00-494-6920
NSN 5985-01-569-3266
NSN 5960-00-556-2621
NSN 6130-01-545-0630
NSN 5910-00-113-5562
NSN 5975-00-071-6918