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 5960-01-406-0299
NSN 6105-00-081-6158
NSN 5925-00-987-8217
NSN 6135-01-219-8612
NSN 6220-01-130-2966
NSN 6220-01-386-1419
NSN 5985-01-601-3948
NSN 5945-00-113-0472
NSN 6130-01-350-3348
NSN 5935-01-087-1036
NSN 5945-00-425-1387
NSN 5915-01-433-7687