990952 Flange Lock Nut | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta flange lock nut weighing 0.043 kg and listed for 49 applications across the D, TAD and EPT ranges. It replaces part numbers 3827323 and 971099.

🚤 Compatibility

• Engine Family: D, TAD, EPT

Full model list at the end of this description.

⚙️ Key Features

• 0.043 kg
• 49 applications across the D, TAD and EPT ranges
• Replaces 3827323 and 971099
• Flange and locking feature in one nut
• Quantity varies by assembly, most commonly two
• Also supersedes Volvo part numbers 3826296, 3826689 and 866780

🔌 Function

Locks a threaded joint with a load-spreading flange and a locking feature that resists the nut turning back.

⚠️ Common Signs of Failure

• Joint loosening under vibration
• Nut running down the thread freely by hand
• Flange face picked up or flattened
• Thread galled or stripped on removal

🛠️ Service Notes

• Two earlier numbers, 3827323 and 971099, both come through as this nut
• Use a new nut on reassembly and pull it up to the figure for the joint rather than to the point where the locking feature stops resisting

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 990952 → Supersedes 3827323

OEM / Related Numbers

• 971099 earlier number superseded by this part

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D13C3-B MH, D13C1-B MH, D13C4-B MH, D13C2-B MP, D13C1-A MP, D13C2-A MP, D13C3-A MP, D13C4-A MP, D13B-E MG, D13B-E MG (FE), D13B-E MH, D13B-E MH (FE), D13B-F MG, D13B-F MG (FE), D13B-N MH, D13B-N MH (FE), D13C4-B MP, D13C5-B MP, D13C6-A MP, D13C1-A MH, D13C2-A MH, D13C1-B MG, D13C3-B MG, D13C2-B MG, D13C4-B MG, D13C5-A MP, D13C2-A MG, D13C1-A MG, D13C7-B MP, D13C8-B MP, D13C9-A MP
• Volvo Penta TAD1640-42GE-B, TAD1640GE, TAD1640-42VE-C
• Volvo Penta TAD1641GE, TAD1641VE
• Volvo Penta TAD1642GE, TAD1642VE
• Volvo Penta TAD1643VE-B, TAD1643VE
• Volvo Penta EPT802
• Volvo Penta TAD1341-43GE-B
• Volvo Penta TAD1344-45GE-B
• Volvo Penta TAD1346GE
• Volvo Penta TAD1371-75VE
• Volvo Penta TAD1380-82GE
• Volvo Penta TAD1381-85VE
• Volvo Penta TAD1384-85VE-IWP
• Volvo Penta TAD1650VE-B/51VE