Aviation Dictionary
فنر نگهدارنده کندوئی شکل ، فنری که رابط پرچ را روی دستگاه پرچ کن نگه میدارد
A hard steel, coil-spring retainer used to hold a rivet set in a pneumatic rivet gun. A beehive spring, which gets its name from its shape, screws onto the end of the rivet gun and allows the rivet set to move back and forth, but prevents it being driven out of the gun.