Back Head 3-1/2″ API is stocked at Crowder Supply under part number MBX501BH02.
Crowder’s breakdowns list this part on the 55BH Hammer, MP55 Hammer, MP55SD Hammer, MC55 Hammer, MP56-DH Hammer and MP56-MQ Hammer.
Use the parts diagram library to work through the rest of the assembly. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.
- Part number: MBX501BH02
- Manufacturer: Mincon
- Crowder SKU: MBX501BH02
- Listed on breakdowns for: 55BH Hammer, MP55 Hammer, MP55SD Hammer, MC55 Hammer, MP56-DH Hammer, MP56-MQ Hammer

