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 6135-01-437-6409
NSN 5950-01-437-1547
NSN 6610-00-530-3955
NSN 5945-01-528-8018
NSN 6105-01-195-6163
NSN 5855-00-763-2155
NSN 5945-01-444-4293
NSN 5935-01-330-3494
NSN 6110-00-508-5892
NSN 5950-00-726-3649
NSN 5960-01-416-6187
NSN 6620-01-130-5700