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 5965-01-367-6483
NSN 2925-00-585-9861
NSN 6240-00-297-3919
NSN 5915-00-518-0851
NSN 5935-01-236-6215
NSN 6650-01-265-0650
NSN 6610-00-168-2200
NSN 6645-00-998-2918
NSN 6650-01-063-7714
NSN 2925-01-542-5671
NSN 5915-00-332-4389
NSN 5999-01-178-9226