11700373 Hexagon Nut | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta hexagon nut from the Engine system group, used as a threaded fastener securing components and brackets at various points on the engine assembly. It is a small, low-mass fastener supplied as a single piece, weighing approximately 2.3 grams. Fasteners of this type are routinely renewed during overhaul or component removal to restore correct clamping force.

🚤 Compatibility

• Engine Family: D, TD, TAD, MD
• HP Range: Approximately 121-300 HP
• Year Range: Approximately 2000-2017

Full model list at the end of this description.

⚙️ Key Features

• OEM Volvo Penta part number 11700373
• System group: Engine
• Hexagon nut - threaded fastener
• Net weight approximately 0.0023 kg (2.3 g)
• Fits D5A, D7A, D7C, MD2010 and TD/TAD 400, 500, 600 and 700 series diesel engines
• Supplied as a single nut
• Engine type: Volvo Penta pushrod-operated industrial diesel
• Quantity varies by assembly, most commonly 12

🔌 Function

The hexagon nut threads onto a stud or bolt to clamp and retain engine-mounted components in their correct position. It maintains the joint's clamping load so the assembly stays secure under engine vibration and thermal cycling.

⚠️ Common Signs of Failure

• Damaged, stripped or cross-threaded internal threads preventing correct torque
• Corrosion or seizure making the nut impossible to remove without damage
• Rounded or deformed hexagon flats that no longer accept a socket or spanner
• Repeated loosening of the joint or loss of clamping force in service
• Visible cracking or distortion after over-torquing

🛠️ 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 / Related Numbers

• 20405524 related valve adjusting screw
• 11700370 related rocker arm
• 955305 related rocker-support screw

Other-Brand OEM Numbers

• VOE11700373

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D7A-B TA, D7A-T, D7A-TA, D7C-B TA, D7C-TA
• Volvo Penta D5A-B TA, D5A-T, D5A-TA
• Volvo Penta MD2010, MD2010B
• Volvo Penta TAD520GE, TAD520VE
• Volvo Penta TAD530GE MECH, TAD530GE EDC4
• Volvo Penta TAD531GE MECH, TAD531GE EDC4
• Volvo Penta TAD720GE, TAD720VE
• Volvo Penta TAD721GE, TAD721VE
• Volvo Penta TAD722GE, TAD722VE
• Volvo Penta TAD730GE MECH, TAD730GE EDC4
• Volvo Penta TAD731GE MECH, TAD731GE EDC4
• Volvo Penta TAD750GE, TAD750VE
• Volvo Penta TD520GE, TD520VE
• Volvo Penta TD720GE, TD720VE PP
• Volvo Penta TAD420VE
• Volvo Penta TAD532GE EDC4
• Volvo Penta TAD550GE
• Volvo Penta TAD551GE
• Volvo Penta TAD560VE
• Volvo Penta TAD561VE
• Volvo Penta TAD620VE
• Volvo Penta TAD650VE
• Volvo Penta TAD660VE
• Volvo Penta TAD732GE EDC4
• Volvo Penta TAD733GE EDC4
• Volvo Penta TAD734GE
• Volvo Penta TAD751GE
• Volvo Penta TAD752GE
• Volvo Penta TAD753GE
• Volvo Penta TAD754GE
• Volvo Penta TAD760VE
• Volvo Penta TAD761VE
• Volvo Penta TAD762VE
• Volvo Penta TAD763VE
• Volvo Penta TAD764VE
• Volvo Penta TAD765VE
• Volvo Penta TD420VE