Graco 102533 Hex Jam Nut

Overview & Compatibility – Graco 102533 Hex Jam Nut

The genuine Graco part no. 102533 is a Hex Jam Nut used to lock and secure assemblies in heavy-duty pump systems. It’s commonly found in industrial Graco Bulldog and King displacement pump families, where vibration resistance and correct thread engagement are critical.

Compatible Machines

• Graco Bulldog – model 949444 (10:1)
• Graco Bulldog – model 954180 (10:1)
• Graco King – model 220648 (20:1)
• Other Graco Bulldog/King displacement pump assemblies (verify by parts list/serial)

Technical Specifications

Key Benefits

• Prevents loosening in high-vibration, high-duty cycles
• Correct fit and thread engagement for Graco pump assemblies
• OEM quality helps maintain performance and reliability

Install & Service Notes

• Verify the 5/8-18 thread and location in your model’s parts manual.
• Inspect mating threads; replace if worn or damaged.
• Torque per the machine’s service manual for adjacent components.

Frequently Asked Questions