This is Chicago Pneumatic part number F037789 (also carried as 3310104261) front head bolt nut, stocked at Crowder Supply as CP-F037789. This part holds and guides the steel. Elongation of the shank bore is the usual reason for replacement, well before any crack appears.
The published breakdown lists it on the CP 1290 1290S 1290SVR Paving Breaker and CP 1290SPDR Spike Driver, and on 1 other machine.
The full diagram library indexes every breakdown we publish, and the CP tool catalog has the tools these parts go into. Denver stock, with same-day shipment on in-stock orders in by 4 PM ET.
- Part number: F037789
- Also listed as: 3310104261
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-F037789
- Listed on breakdowns for: CP 1290 1290S 1290SVR Paving Breaker, CP 1290SPDR Spike Driver, CP 1240 1240S 1240SVR Paving Breaker
