【化】 螺纹法兰

screwed

have one's head screwed on the right way

blind nut【机】;cap nut【机】;screwed cap【机】

screwed

cap nut【机】;nut【机】;screwed cap【机】

screwed flange(s)【机】

spigot nut screwed pipe joint

screw-threaded connection (screwed connection)