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 6130-01-478-8473
NSN 2925-01-327-3069
NSN 5895-00-554-4573
NSN 5965-01-160-2691
NSN 4140-01-315-6873
NSN 2925-01-157-9204
NSN 2925-01-239-6044
NSN 5930-00-433-9053
NSN 5950-00-962-8568
NSN 5945-00-167-2756
NSN 6240-01-119-5199
NSN 5930-01-612-6388