The Astralpool 4405010134 retaining screw has a left-hand thread and an M8 thread size.
- Type: Retaining screw
- Thread direction: Left-hand
- Thread size: M8
- Compatibility: Victoria, Sprint Self-Priming, Victoria Plus, Alaska Max, Nautilus, Malawi UT, Malawi SP, Malawi ST, UltraPlus, Superplus, StarPlus, Proline, Victoria Plus Silent, and Nautilus Silent pump series