21453372 Hex Socket Screw | Genuine Volvo Penta Part

🔧 Product Description

A genuine socket-head fastener used in the common-rail fuel-injection and injector mounting assembly of the applicable Volvo Penta diesel engine.

🚤 Compatibility

• Engine Family: TAD, D, TADH

Full model list at the end of this description.

⚙️ Key Features

• Precision hexagon-socket head
• Correct OEM thread, length and strength grade
• Suitable for high-pressure fuel-system hardware
• Allows controlled torque application
• Used in quantities of six on designated assemblies
• Quantity varies by assembly, most commonly six

🔌 Function

The screw clamps the assigned injector, rail or fuel-system component with the precise load required to maintain alignment and sealing.

⚠️ Common Signs of Failure

• Rounded socket
• Stretched fastener
• Damaged or contaminated threads
• Fastener unable to retain torque
• Evidence of incorrect tightening during injector service

🛠️ Service Notes

• Use a hex key or bit that fills the socket fully and is not rounded off — a sloppy tool fit is what ruins these heads
• Clean paint, sealant and dirt out of the socket before engaging the tool, and check the threads and the mating face are clean and dry
• Tighten to the figure and sequence given in the workshop manual for the assembly, rather than by feel — socket screws are often used where clamp load matters and access is poor
• Renew any screw whose socket is damaged, and refit with thread-locking compound only where the manual for that assembly calls for it
• Start every screw by hand so it picks up the thread square, particularly into aluminium housings where a cross-threaded start ruins the casting

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D8A2-A MP, D8A5-A MH, D8A6-A MH, D8A5-A MG, D8A6-A MG, D8A4-A MP, D8A1-A MP, D8A3-A MP
• Volvo Penta TAD840GE, TAD840-43VE, TAD840GE-B
• Volvo Penta TAD570-72VE, TAD570-71VE-B
• Volvo Penta TAD880-82GE, TAD880-84VE
• Volvo Penta TADH880-82GE, TADH880-84VE
• Volvo Penta TAD540-42VE
• Volvo Penta TAD550-51VE
• Volvo Penta TAD552VE
• Volvo Penta TAD580-83VE
• Volvo Penta TAD841-43GE
• Volvo Penta TAD850-52VE
• Volvo Penta TAD851-53GE
• Volvo Penta TAD852VE-B
• Volvo Penta TAD853VE
• Volvo Penta TAD870-73VE