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 5998-00-929-6091
NSN 6620-01-652-4349
NSN 5855-01-606-3587
NSN 5895-01-273-4436
NSN 6135-01-487-6275
NSN 6685-00-141-4300
NSN 5905-01-267-3399
NSN 5950-01-069-9246
NSN 6685-00-896-6847
NSN 5945-01-009-3733
NSN 6240-01-582-8354
NSN 5895-00-837-2343