allen type socket screw
screw socket
螺旋口插座
螺旋接管套
螺旋灯座
螺丝口灯头
螺旋座
螺旋灯头
螺丝料
螺口灯头
screw hexagon socket head cap screw
mild steel hexagonal socket screw
medium egg-plant screw indicating lamp bulb
hexagonal socket head cap screw
hexagon socket set screw
Hexagon socket screw keys
hexagon socket head screw
hexagon socket head cap screw
hexagon socket head cap head screw
hexagon socket countersunk head cap head screw