Half socket, seamless
HM.
Hemispherical head
HH.
Hexagon bushing
RS.
Hexagon cap
KA.
Hexagon hose nozzle
TU.
Hexagon nipple
DN6
Hexagon nipple parallel thread
DN.Z
Hexagon plug
ST.
Hollow bar
HS.
Hose band clip
SK.
Hose nozzle with female thread
TUMU
Hose nozzle with loose nut
TULU