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 6130-01-650-2460
NSN 5855-01-007-9541
NSN 4140-01-569-7183
NSN 5905-01-583-6114
NSN 5915-01-307-0867
NSN 7035-01-126-6023
NSN 5960-01-113-4839
NSN 5920-01-574-8240
NSN 6240-01-344-1105
NSN 6145-01-346-6219
NSN 6145-00-351-4539
NSN 5965-01-642-1560