ID
1362810
$ 18.85
1-2 weeks delivery time
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The Nanni Diesel 970311226 3/8 union bolt is a precision fastener used to secure cooler-line connections within the fuel and oil cooler systems, helping maintain tight, leak-resistant joints in demanding marine engine installations. Positioned in the fuel or oil cooler assemblies (including the fuel and oil cooler and the gearbox oil cooler), it fits 4.390TDI Stern Drive, T4.155, 4.380TDI, T6.420TDI, and T6.300 Stern Drive engines.
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Nanni Diesel 3/8 Union Bolt for Cooler Line Connections
The Nanni Diesel 970311226 is a 3/8 union bolt designed for cooler-related assemblies where secure fluid-line connections are critical. Used in the fuel and oil cooler system, the fuel cooler, and the gearbox oil cooler, this bolt helps clamp and retain unions so fuel and oil cooling circuits stay properly sealed under marine operating conditions.
Compatibility
- 4.390TDI Stern Drive engines
- T4.155 engines
- 4.380TDI engines
- T6.420TDI engines
- T6.300 Stern Drive engines
Technical Specifications
Brand Nanni Diesel Part Number 970311226 Type Union Bolt Size 3/8
Product Details
- Assembly Location: Fuel / Oil Cooler; Fuel Cooler; Gearbox Oil Cooler
- Role: Secures union-style connections to support stable, leak-resistant cooler circuit plumbing
Features
- OEM-fit union bolt for Nanni Diesel cooler assemblies
- Supports secure fuel and oil cooler line retention in tight engine-room layouts
- Helps maintain system integrity by keeping unions firmly clamped and aligned
- Suitable for stern drive applications where vibration-resistant connections matter
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