990960 Flange Lock Nut | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta flange lock nut weighing 0.005 kg and listed for 177 applications across the D, TAD, DPH, TSK, DPI and DPR ranges - the widest fitment of the eight flange lock nuts listed here. It supersedes part number 977938.

🚤 Compatibility

• Engine Family: D, TAD, DPH, TSK, DPI, DPR, TWD, TADH
• HP Range: 150-480 HP

Full model list at the end of this description.

⚙️ Key Features

• 0.005 kg
• 177 applications across six ranges
• Widest fitment of the eight flange lock nuts listed here
• Supersedes 977938
• Quantity varies by assembly, most commonly one

🔌 Function

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

⚠️ Common Signs of Failure

• Fastener found loose or missing
• Nut spinning freely down the thread by hand
• Flange serrations flattened
• Thread stripped or crossed

🛠️ Service Notes

• It appears on more applications than any other flange lock nut in this run, so check the part number against the specific joint rather than assuming a nut of this size is the right one
• Fit new - a locking nut that has been released will not hold to the same figure again

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 990960 → Supersedes 977938

OEM / Related Numbers

• 977938 earlier number superseded by this part
• 979230 referenced in the part notes

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D6-370A-C, D6-350A-A, D6-350A-B, D6-330A-D, D6-330D-E, D6-370D-E, D6-370D-B, D6-330D-B, D6-330A-F, D6-370A-F, D6-370D-A, D6-330D-C, D6-330A-C, D6-370D-C, D6-330D-D, D6-370D-D, D6-330D-F, D6-370A-D, D6-330A-E, D6-370A-E, D6-370D-F, D6-330I-D, D6-310I-B, D6-280I-B, D6-280I-C, D6-280I-D, D6-280I-E, D6-310I-D, D6-435I-D, D6-310I-E, D6-280I-A, D6-310I-A, D6-300A-F, D6-300D-F, D6-300I-F, D6-310D-A, D6-310D-B, D6-310D-D, D6-310D-C, D6-310D-E, D6-370I-A, D6-370I-B, D6-330I-B, D6-330I-C, D6-370I-C, D6-370I-D, D6-310A-B, D6-280A-C, D6-310A-C, D6-310A-A, D6-280A-D, D6-310A-D, D6-280A-E, D6-310A-E, D6-310I-C, D6-280A-A, D6-280A-B, D6-300A-G, D6-340A-G, D6-380A-G, D6-400A-G, D6-440A-G, D6-330I-F, D6-370I-F, D6-400A-E, D6-435D-A, D6-435D-D, D6-435D-E, D6-435D-F, D6-435I-A, D6-435I-C, D6-435I-E, D6-400A-F, D6-435D-C, D6-435I-F, D6-330I-E, D6-370I-E, D6-330A-B, D6-370A-B, D6-480A-G
• Volvo Penta D4-260A-B, D4-260A-A, D4-260A-C, D4-260A-D, D4-260A-E, D4-260A-F, D4-260D-B, D4-260D-C, D4-260D-D, D4-260D-E, D4-260D-F, D4-260I-A, D4-260I-B, D4-260I-C, D4-260I-D, D4-260I-E, D4-260I-F, D4-300A-A, D4-300A-C, D4-300A-D, D4-300A-E, D4-300A-F, D4-300D-A, D4-300D-C, D4-300D-D, D4-300D-E, D4-300D-F, D4-300I-A, D4-180I-C, D4-225I-C, D4-180I-D, D4-225I-D, D4-180I-E, D4-225I-E, D4-180I-F, D4-225I-F, D4-210A-A, D4-210A-B, D4-225A-B, D4-225A-C, D4-225A-D, D4-300I-C, D4-300I-D, D4-300I-E, D4-300I-F, D4-225A-E, D4-225A-F, D4-210I-A, D4-210I-B, D4-180I-B, D4-225I-B, D4-150A-G, D4-230A-G, D4-270A-G, D4-320A-G, D4-300A-G
• Volvo Penta TSK DPH, TSK DP-H, TSK DP-H/DPR, TSK DPH-A, TSK DPH-AP, TSK DPH-AS, TSK DPH-B, TSK DPH-BP, TSK DPH-BS, TSK DPH-C, TSK DPH-E, TSK DPH-D
• 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 D11C1-A MP, D11C3-A MP, D11C2-A MP, D11C4-A MP
• Volvo Penta DPH-D1, DPH-E, DPH-A, DPH-C
• Volvo Penta DPR-A, DPR-C, DPR-B
• Volvo Penta DPI-A
• Volvo Penta TAD840-43VE
• Volvo Penta TAD850-52VE
• Volvo Penta TAD853VE
• Volvo Penta TAD870-73VE
• Volvo Penta TAD880-84VE
• Volvo Penta TADH880-84VE
• Volvo Penta TWD1744GE