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 5920-01-123-9854
NSN 5835-00-490-0530
NSN 5945-01-070-5962
NSN 6135-00-891-4944
NSN 6135-00-992-8750
NSN 5999-01-548-7046
NSN 6145-01-499-9085
NSN 5895-00-811-4300
NSN 5855-00-586-6255
NSN 5920-00-752-3081
NSN 5965-01-362-9609
NSN 5998-00-490-1656