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 6620-00-952-4278
NSN 5945-01-515-4124
NSN 5965-01-382-3222
NSN 5915-01-433-2128
NSN 5965-01-248-6345
NSN 5935-00-466-7379
NSN 5975-01-617-5578
NSN 5965-01-640-7104
NSN 5935-00-245-0076
NSN 5855-01-311-6666
NSN 5855-01-129-1327
NSN 6240-01-110-8265