990949 Flange Lock Nut | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta flange lock nut weighing 0.005 kg and listed for 76 applications across the D and TAD ranges. It supersedes part number 949278, which was catalogued earlier as a lock nut.

🚤 Compatibility

• Engine Family: D, TAD
• HP Range: 145-480 HP

Full model list at the end of this description.

⚙️ Key Features

• 0.005 kg
• 76 applications across the D and TAD ranges
• Supersedes 949278, earlier catalogued as a lock nut
• Flange and locking feature in one nut
• Quantity varies by assembly, most commonly one
• Also supersedes Volvo part numbers 10591 and 865203

🔌 Function

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

⚠️ Common Signs of Failure

• Nut loose or missing at the next inspection
• Nut running freely down the thread by hand, showing the locking action has gone
• Flange serrations flattened
• Thread stripped or crossed

🛠️ Service Notes

• Fit a new nut rather than reusing one that has been off - the locking feature is spent after the first release
• Flange lock nut 990951 at 0.006 kg sits very close to this one on weight and covers 72 applications on the same D and TAD ranges, so order by part number

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 990949 → Supersedes 949278 → Supersedes 21133388

OEM / Related Numbers

• 949278 earlier number superseded by this part
• 946035 earlier number superseded by this part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, D13B-E MH, D13B-E MH (FE), D13B-N MH, D13B-N MH (FE), D13C4-B MP, D13C5-B MP, D13C1-A MH, D13C1-B MG, D13C3-B MG, D13C2-B MG, D13C4-B MG, D13C2-A MG, D13C1-A MG, D13C7-B MP, D13C8-B MP, D13C9-A MP
• Volvo Penta D6-340I-G, D6-380I-G, D6-440I-G, D6-480I-G, D6-300A-G, D6-340A-G, D6-380A-G, D6-440I-WJ-G, D6-480I-WJ-G, D6-300D-G, D6-340D-G, D6-380D-G, D6-440D-G, D6-480D-G, D6-400A-G, D6-440A-G, D6-300I-G
• Volvo Penta D4-175I-G, D4-230I-G, D4-270I-G, D4-320I-G, D4-300I-G, D4-150A-G, D4-230A-G, D4-270A-G, D4-320A-G, D4-300A-G, D4-145I-G, D4-175 VG
• 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, D8A7-A MP, D8A8-A MP
• Volvo Penta D16C1-E MG, D16C1-F MG, D16C2-E MG, D16C2-F MG, D16C1-E MH, D16C1-F MH, D16C2-E MH, D16C2-F MH
• Volvo Penta D11C1-A MP, D11C3-A MP, D11C2-A MP, D11C4-A MP
• Volvo Penta TAD1351-53VE
• Volvo Penta TAD1371-75VE
• Volvo Penta TAD1380-82GE
• Volvo Penta TAD1381-85VE
• Volvo Penta TAD1384-85VE-IWP