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 5950-00-804-5249
NSN 5835-00-163-1788
NSN 2925-01-320-6512
NSN 5895-01-310-7485
NSN 5975-00-107-4283
NSN 5945-01-367-8804
NSN 5915-00-759-2899
NSN 5965-00-499-8229
NSN 6220-01-281-5464
NSN 6135-00-112-8637
NSN 5855-01-472-4519
NSN 5935-00-584-7365