OMAS Big Sliding Alloy Headset Top Locknut: 1" Threaded (BSA) - 8g - Campagnolo Nuovo/Super Record Upgrade!

O.M.A.S. is famous for their Campagnolo Record / Super Record upgrade parts, nuts, and bolts.  They produced these parts mainly from 1978 through the early 80's. This is from their flagship Big Sliding headset, and it is also used as a direct...