955739 Hexagon Screw | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta hexagon screw of the late type for the 1.98:1 reverse gear ratio, 64 mm long, weighing 0.125 kg and listed for 98 applications across the MD, TMD, TAMD and D series. It supersedes 921708. Its early-type counterpart 955738 is the 57 mm screw for the same ratio, so the build and the length both have to be checked.

🚤 Compatibility

• Engine Family: MD, TMD, TAMD, D
• HP Range: 145-480 HP

Full model list at the end of this description.

⚙️ Key Features

• Late type
• For the 1.98:1 reverse gear ratio
• 64 mm long
• 0.125 kg
• Supersedes 921708
• L=64mm (Volvo assembly listing)
• Quantity varies by assembly, most commonly six

🔌 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
• 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

• 955738 is the early type at 57 mm for the same 1.98:1 ratio - 7 mm separates the pair, so measure rather than judge by eye
• Once the 1.98:1 ratio is confirmed, the 64 mm length is what identifies the late-type screw

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 955739 → Supersedes 921708

OEM / Related Numbers

• 921708 earlier number superseded by this part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 D9A2J, D9A2G, D9A2L MH, D9A2D, D9A2B, D9A2F, D9A2K, D9A2H, D9A2M MP, D9A2A, D9A2C, D9A2E
• Volvo Penta D4-300I-F, D4-175I-G, D4-230I-G, D4-270I-G, D4-320I-G, D4-300I-G, D4-230A-G, D4-270A-G, D4-320A-G, D4-145I-G
• Volvo Penta D6-340I-G, D6-380I-G, D6-440I-G, D6-480I-G, D6-440I-WJ-G, D6-480I-WJ-G, D6-300I-G, D6-330I-F, D6-370I-F, D6-435I-F
• Volvo Penta D12C-A MP, D12D-A MP, D12D-B MP, D12D-C MP, D12D-D MP, D12D-E MP, D12D-F MP, D12D-G MP, D12D-H MP
• Volvo Penta D11B3-A MP, D11A-A, D11A-B, D11A-C, D11A-E, D11A-D MP, D11B1-A MP
• Volvo Penta TAMD74P-A, TAMD74P-B, TAMD74A, TAMD74C-A, TAMD74C-B, TAMD74L-A, TAMD74L-B
• Volvo Penta D7A-B TA, D7A-T, D7A-TA, D7C-B TA, D7C-TA
• Volvo Penta TAMD122A, TAMD122A/C, TAMD122D, TAMD122P-A, TAMD122P-B
• Volvo Penta D8A5-A MH, D8A6-A MH, D8A1-A MP, D8A3-A MP
• Volvo Penta D5A-B TA, D5A-T, D5A-TA
• Volvo Penta MD100A, MD100B, MD100B-CC
• Volvo Penta MD2010, MD2010B
• Volvo Penta TAMD102A, TAMD102D
• Volvo Penta TAMD63L-A, TAMD63P-A
• Volvo Penta TAMD71B, TAMD71A
• Volvo Penta TAMD72A, TAMD72P-A
• Volvo Penta TAMD73P-A, TAMD73WJ-A
• Volvo Penta MD120A
• Volvo Penta MD70B
• Volvo Penta TAMD120A
• Volvo Penta TAMD121D
• Volvo Penta TAMD61A
• Volvo Penta TAMD62A
• Volvo Penta TAMD75P-A
• Volvo Penta TMD100A
• Volvo Penta TMD120A
• Volvo Penta TMD121C
• Volvo Penta TMD70B