Zodiac Vortex 3 Saphir A2 stainless steel pan head Pozi screw M4×25 mm - W1828A

Zodiac Vortex 3 Saphir A2 stainless steel pan head Pozi screw M4×25 mm

This is the genuine Zodiac OEM pan head Pozi machine screw used in the structural assembly of the Vortex 3 Saphir robotic pool cleaner. Specified as VP TCL POZI 4×25 A2, it is an M4×25 mm large pan head fastener machined from A2 (304) stainless steel, providing reliable corrosion resistance in permanently wet, chlorinated pool water environments.

Function and location in the robot

These screws secure the outer shell panels, internal brackets and component sub-assemblies of the Vortex 3 Saphir together. The large pan head distributes clamping load evenly across plastic housings without cracking them, while the full machine thread locks firmly into the robot’s moulded or threaded inserts. The Pozidriv recess delivers positive torque transfer and reduces the risk of cam-out during disassembly in the field.

Modelos compatíveis

This fastener is a factory-specified part for the Zodiac Vortex 3 Saphir (model reference W9300). Always verify against your robot’s exploded-view diagram before ordering, as other Vortex variants use different screw lengths — for example, the shorter M4×12 mm variant (W1021A) is used at separate fixing points on the same robot.

When to replace this screw

Replace immediately if the screw head is corroded, the Pozi recess is worn or stripped, or if the thread is damaged and no longer torques to resistance. A loose or missing fastener will cause panel rattle, misalignment of internal components and, in severe cases, ingress of grit into the drive train. A stripped thread in the host housing is a sign the wrong screw length or grade has previously been fitted.

Why genuine Zodiac matters

Zodiac specifies A2 stainless for this application as a balance between corrosion resistance and cost-effectiveness in pool water. Substituting a lower-grade zinc-plated or mild steel screw will result in rapid rust staining on pool surfaces and eventual fastener failure. Genuine Zodiac fasteners are manufactured to the exact thread pitch, head diameter and drive geometry required, ensuring correct torque and a secure fit every time.