кільце запобіжної чеки
arming pin; safety pin
base junction; rotary collector ring (box); rotary base junction (of a tank); rotary connection; slip ring; traverse rotary base junction
life ring (ring buoy)
firing pin retaining pin
track pin retaining pin
belt-feed pawl pin / belt feed pawl pin
safety spring retaining pin
firing pin safety
grip-safety pin
safety pin
safety and arming device / safety-and-arming device
base ring
breech ring (of firearm)
D-ring
gun ring
jet ring
retaining ring
stator ring
stiffener ring
X ring
defense ring
power-slip ring
slinger ring
slip ring
slip-ring box
slip-ring terminal
fire extinguishing ring
sprocket ring
tie-down ring
trunnion ring
adjustable ring
adjusting nut ring