This is Atlas Copco part number 3378512064 adaptor – 1/2″BSP x1 1/4″ UNC, stocked at Crowder Supply as AC-3378512064. This is the supply connection for the drill. Damaged threads or a chewed sealing face cost pressure at the working end.
It appears on the MHC5 Hydraulic Core Drill and LCD 500 & LCD 1500 Hydraulic Core Drill, and on 1 other machine breakdown. Check it against the reference number on the diagram first; serial breaks change what fits.
The parts diagram hub indexes every breakdown we publish, and the Atlas Copco catalog has the tools these parts go into. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.
- Part number: 3378512064
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3378512064
- Listed on breakdowns for: MHC5 Hydraulic Core Drill, LCD 500 & LCD 1500 Hydraulic Core Drill, COR 5/15 Hydraulic Core Drill

