Shimano FH - HG50 7 Speed Freehub body / Supplied with fixing bolt as shown in Pic..

7 Speed  HG / UG  ( External / Internal threaded )..

UG - External thread diameter measures Approx. 34.5mm.. ( Accepts most UG cassettes accept Dura Ace ) .. 

Part for FH HG50  -  7 Freehub - Circa 1990..

Art. no 30H9801  /   Overall body length - Approx - 36mm..

Please note - Early series 7 Sp. body ( Minimum 12 t Top cog compatible )....

Suitable for FH HG50 , FH M550 / 7 Speed  Freehubs etc.