Park Tool 692 Rubinetto staffa inferiore inglese sinistro per BTS-1 BSA 1.370 x 24
It is sized for1.370" x 24 TPI left-hand threading, the standard used forEnglish threaded bottom bracket shells. Designed for thePark Tool BTS-1 Bottom Bracket Tapping Set. Intended Use:Tapping English threaded bottom bracket shells.