21252722 Flange Screw | Genuine Volvo Penta Part

🔧 Product Description

Genuine flange screw used to mount the seawater pump on Volvo Penta D1-30 and D2-55 marine diesel engines.

🚤 Compatibility

Typically suits:

• Volvo Penta D2-40
• Volvo Penta D2-40B
• Volvo Penta D2-40F
• Volvo Penta D2-55
• Volvo Penta D2-55B
• Volvo Penta D2-55C
• Volvo Penta D2-55D
• Volvo Penta D2-55E
• Volvo Penta D2-55F
• Volvo Penta D2-50F
• Volvo Penta D2-75
• Volvo Penta D2-75B
• Volvo Penta D2-75C
• Volvo Penta D2-75F
• Volvo Penta D2-60F
• Volvo Penta D1-30
• Volvo Penta D1-30B
• Volvo Penta D1-30F

• Engine Family: D
• HP Range: 30-75 HP

⚙️ Key Features

• Genuine Volvo Penta pump-mounting screw
• Integrated load-distributing flange
• Correct OEM length and strength grade
• Suitable for wet marine-engine environments
• Maintains pump alignment and sealing pressure
• 4 used per assembly

🔌 Function

The screw secures the seawater pump to the engine and maintains the clamping force required at the mounting and sealing surfaces.

⚠️ Common Signs of Failure

• Corroded threads
• Pump movement
• Leakage at the pump mounting
• Stretched shank
• Inability to retain torque

🛠️ Service Notes

• The integral flange spreads the load and forms the bearing face, so do not add a separate washer unless the workshop manual for your engine specifically calls for one
• Clean the threads and the seating face before fitting — grit, paint or old sealant under the flange gives a false torque reading and the joint will slacken off in service
• Where the flange is serrated it must bear directly on clean metal to grip; discard any screw with a deformed flange or damaged serrations rather than reusing it
• Tighten to the torque and sequence given in the workshop manual for your engine, and treat the screw as single-use where the manual specifies an angle-tightened or stretch fastener
• Check the thread in the receiving component at the same time; a pulled or corroded thread will not hold a new screw however carefully it is torqued

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging