Stainless Steel DIN1480 Turnbuckles

Turnbuckles have been used in aircraft construction. Historically,
biplanes might use turnbuckles to adjust the tension on structural
wires bracing their wings. Turnbuckles are also widely used on flexible
cables in flight control systems. In both cases they are secured with
lockwire or specifically designed wire clips to prevent them from
turning and losing tension due to vibration.