955821 Hexagon Nut | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta hexagon nut for the D and MD engine families and MS series reverse gears, weighing 0.018 kg and listed for 46 applications. It supersedes 3836925, which was catalogued earlier simply as a nut.

🚤 Compatibility

• Engine Family: D, MS, MD
• HP Range: 13-40 HP

Full model list at the end of this description.

⚙️ Key Features

• For D, MS and MD applications
• 0.018 kg
• Supersedes 3836925, previously catalogued as a nut
• 46 applications listed

🔌 Function

Clamps a bolted joint, holding the assembly tight against the screw or stud thread.

⚠️ Common Signs of Failure

• Flats rounded off by a slipping spanner
• Thread stripped or picked up on removal
• Salt corrosion seizing the nut to its stud
• Joint slackening in service

🛠️ Service Notes

• Check the stud or bolt thread is clean and undamaged and run the nut down by hand first; grit on the thread gives a false torque reading
• Tighten to the torque in the workshop manual for your engine, following the specified sequence on multi-fastener joints and working round in stages so the load comes up evenly
• Renew self-locking and all-metal locking nuts rather than reusing them — once the locking feature has been through a cycle it no longer holds reliably
• Fit the washer, tab or locking arrangement that belongs with that joint; a locking device that was bent or crimped in service should be replaced, not straightened and reused
• Marine-grade anti-seize on stainless threads reduces galling and makes later removal possible, but keep it off threads that must take a locking compound

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 955821 → Supersedes 3836925

OEM / Related Numbers

• 3836925 earlier number superseded by this part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 2003, 2003R, 120S-B, 2003TB, 120SC, 2001B, 2001D, 2003D, 2003T, 2003TR, 2002B, 2002D, 2003B, 2001, 2002, 2001R
• Volvo Penta D1-30, D1-30B, D1-30F, D1-13, D1-13B, D1-13F, D1-20, D1-20B, D1-20F
• Volvo Penta MD2010, MD2010B, MD2010-C, MD2010-D
• Volvo Penta MD2020, MD2020B, MD2020-C, MD2020-D
• Volvo Penta MD2030, MD2030B, MD2030-C, MD2030-D
• Volvo Penta MD2040, MD2040B, MD2040-C, MD2040-D
• Volvo Penta D2-40, D2-40B, D2-40F
• Volvo Penta MS2B, MS2V