976644 Hex Socket Screw | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta hexagon socket screw weighing 0.054 kg and listed for 26 applications across BB, DP, SP, MS and SHIELD series drives and transmissions. It supersedes part number 856581, which was catalogued earlier as a vibration damper.

🚤 Compatibility

• Engine Family: BB, DP, SP, MS, S

Full model list at the end of this description.

⚙️ Key Features

• 0.054 kg
• Supersedes 856581
• 26 applications
• BB, DP, SP, MS and SHIELD series drives and transmissions
• 3 used per assembly

🔌 Function

Clamps two components together, the hexagon socket taking the tightening torque where there is no spanner access to the head.

⚠️ Common Signs of Failure

• Screw found loose or backed off at service
• Socket rounded out by a worn or poor-fitting key
• Thread stripped, galled or seized on removal
• Head corroded so a key will no longer seat fully
• A clamped joint that frets, works or weeps

🛠️ Service Notes

• The old number 856581 was listed as a vibration damper, so an order raised on that number will now bring this screw and not a damper - check what you actually need
• 977282 is the other hexagon socket screw in this group at 0.084 kg and is a different fastener

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 976644 → Supersedes 856581

OEM / Related Numbers

• 856581 earlier number superseded by this part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 740B, 501B, 570A, 572A, 740A, 430A, 430B, 431A, 431B, 432A, 434A, 570, 500B, 430
• Volvo Penta DP-C, DP-C1, DP-D, DP-D1, DP-A, DP-A2
• Volvo Penta SP-C, SP-A2, SP-C1
• Volvo Penta BB740A
• Volvo Penta MS4B
• Volvo Penta Shield for 740A