991609 Flange Screw | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta lock bolt M12. The folder lists it as installation hardware, Duoprop types G and H - for newer DPH drives, DPH-D and DPH-D1, with an internally threaded propeller shaft intended for the lock bolt, from serial number 302029042.

🚤 Compatibility

• Engine Family: D, DPH, IPS, DPI
• HP Range: 150-440 HP

Full model list at the end of this description.

⚙️ Key Features

• 0.079 kg
• 52 applications across the D, DPH, IPS and DPI series
• Supersedes 3847628
• No published thread size
• Quantity varies by assembly, most commonly four
• Lock bolt M12.
• Installation hardware, Duoprop types G and H - for newer DPH drives, DPH-D and DPH-D1, with an internally threaded propeller shaft intended for the lock bolt, from serial number 302029042.

🔌 Function

Clamps a joint with an integral flanged head that spreads the load over the mating face without a separate washer.

⚠️ Common Signs of Failure

• Joint working loose, weeping or fretting at the flange face
• Thread stripped, stretched or pulled
• Flange face under the head bruised, dished or corroded
• Head drive recess rounded out

🛠️ Service Notes

• Clean the mating face and threaded hole before refitting so the torque figure means something

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 991609 → Supersedes 3847628

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D13C2-B MP, D13C2-A MP, D13C4-A MP, D13B-L MP, D13B-G MP, D13B-K MP, D13B-C MP, D13C6-A MP, D13C4-B MP, D13C5-B MP, D13C5-A MP, D13C7-B MP, D13C8-B MP
• Volvo Penta D6-330A-F, D6-370A-F, D6-300A-F, D6-300A-G, D6-340A-G, D6-380A-G, D6-400A-G, D6-440A-G, D6-400A-F
• Volvo Penta D4-260A-F, D4-300A-F, D4-225A-F, D4-150A-G, D4-230A-G, D4-270A-G, D4-320A-G, D4-300A-G
• Volvo Penta D11C2-A MP, D11C4-A MP, D11B4-A MP, D11B2-A MP, D11A-C MP, D11A-D MP, D11A-E MP
• Volvo Penta D8A2-A MP, D8A4-A MP, D8A8-A MP
• Volvo Penta IPS2-C, IPS2-A, IPS2-B
• Volvo Penta DPH-D1, DPH-E
• Volvo Penta IPS20-D, IPS20-E
• Volvo Penta IPS3-C, IPS3-A
• Volvo Penta IPS30-E, IPS30-D
• Volvo Penta DPI-A