991635 Hexagon Screw | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta hexagon screw weighing 0.052 kg and listed for 18 applications across the D series. No thread size or length is published for it, so order on the part number — the other hexagon screw in this run, 992480, is a much heavier fastener at 0.345 kg on TAD and TADH applications.

🚤 Compatibility

Typically suits:

• Volvo Penta D3-140A-D
• Volvo Penta D3-170A-D
• Volvo Penta D3-140I-D
• Volvo Penta D3-140A-E
• Volvo Penta D3-170A-E
• Volvo Penta D3-140I-E
• Volvo Penta D3-140A-F
• Volvo Penta D3-170A-F
• Volvo Penta D3-140I-F
• Volvo Penta D3-110I-D
• Volvo Penta D3-150I-D
• Volvo Penta D3-170I-D
• Volvo Penta D3-110I-E
• Volvo Penta D3-150I-E
• Volvo Penta D3-170I-E
• Volvo Penta D3-110I-F
• Volvo Penta D3-150I-F
• Volvo Penta D3-170I-F

• Engine Family: D
• HP Range: 110-170 HP

⚙️ Key Features

• 0.052 kg
• 18 applications across the D series
• No published thread size or length

🔌 Function

Clamps a joint using a plain hexagon head driven by a spanner or socket.

⚠️ Common Signs of Failure

• Joint working loose or fretting
• Thread stripped, stretched or pulled
• Hexagon head rounded off
• Corrosion or seizure in the threaded hole

🛠️ Service Notes

• Check the length, thread and strength grade of the replacement against the screw you removed — engine fasteners are chosen for a specific clamp load, and a longer or softer screw is not a substitute
• Clean the threads in the component and make sure the mating faces are clean and flat before assembly; dirt, paint or old sealant in a joint feels like tightness and leaves the joint loose
• Tighten to the torque figure and the tightening sequence given in the workshop manual for your engine, working up progressively rather than pulling each screw down in one go
• Use thread locking or sealing compound only where the manual calls for it, and renew the locking washer, tab washer or nut that works with the screw
• Renew rather than reuse screws that are corroded, thread-damaged or visibly stretched, and any screw the manual tightens by torque-plus-angle

📦 Condition

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