955738 Hexagon Screw | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta hexagon screw of the early type for the 1.98:1 reverse gear ratio, 57 mm long, weighing 0.118 kg and listed for 20 applications across the MD, TMD and TAMD series. It supersedes 921707. Its late-type counterpart 955739 is 64 mm long for the same ratio, so both the build and the 57 mm length have to match.

🚤 Compatibility

Typically suits:

• Volvo Penta MD100B
• Volvo Penta TMD70C
• Volvo Penta TAMD61A
• Volvo Penta TAMD62A
• Volvo Penta TMD121C
• Volvo Penta TAMD71B
• Volvo Penta TAMD72A
• Volvo Penta TAMD72P-A
• Volvo Penta TAMD72WJ-A
• Volvo Penta TAMD70E
• Volvo Penta TAMD71A
• Volvo Penta TAMD102A
• Volvo Penta TAMD102D
• Volvo Penta TAMD121D
• Volvo Penta TAMD122A
• Volvo Penta TAMD122A/C
• Volvo Penta TAMD122D
• Volvo Penta MD100B-CC
• Volvo Penta TAMD60C
• Volvo Penta MD70C

• Engine Family: MD, TMD, TAMD

⚙️ Key Features

• Early type
• For the 1.98:1 reverse gear ratio
• 57 mm long
• 0.118 kg
• Supersedes 921707
• L=57mm (Volvo assembly listing)

🔌 Function

Bolts two components together, clamping the joint through a plain hexagon head.

⚠️ Common Signs of Failure

• Screw found loose or backed out at service
• Hex flats rounded off by a slipping spanner
• Thread stripped in the screw or in its tapping
• Screw stretched or snapped at the shank
• Oil weeping at the gearbox joint as clamp load is lost

🛠️ Service Notes

• Confirm the ratio and the build before ordering - 955739 is the late type at 64 mm for the same 1.98:1 ratio, and 7 mm is all that separates them
• The plain 57 mm screws in this run, 955530, 955538, 955565 and 955580, are not alternatives to the reverse-gear screw

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 955738 → Supersedes 921707

OEM / Related Numbers

• 921707 earlier number superseded by this part

📦 Condition

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