FIELD: mechanical engineering. SUBSTANCE: fastener has body 1 made in form of truncated cone with head 2 and flexible split ring 3 which is made of organic glass tube preliminarily stretched along axis. Body with head is made of heat-resistant material. When source of heat acts on head 2, ring 3 gets heated and changes to high-elastic state. As a result, effect of thermomechanical memory arises: length of ring is reduced and thickness of wall is increased. Material of ring fills circular clearance between body 1 and wall of seat 4. Fastener is reliably wedged. EFFECT: enhanced reliability. 2 dwg
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