кругла головка; напівпотайна головка; сферична головка; кульова головка
button head cap screws
penetrating head injury / open head injury
drop head body (drop-head body)
head-to-head flyoff
infrared homing head (IR homing head)
alarm button
button up
lapel button / insignia / miniature
magazine catch button
panic button
fast slave button
feed-pawl lifter button
focus button
slave button
button switch
button-rifling
choke button
elevation button
heater button
horn button spring
push-button control
starter button
button / press key
press key / button
lapel button
ident button
fire-control button
firing button
launch button
bind button
boot button
channel button