Astralpool - Dolphin EasyKleen screw WN1412 A2 KA50×25 - 3305025-A

Astralpool Dolphin EasyKleen screw WN1412 A2 KA50×25

This is a genuine Astralpool Maytronics fastener: a Ø 5.0 mm × 25 mm A2 stainless-steel thread-forming screw conforming to the WN1412 standard, specified for use in the Dolphin EasyKleen robotic pool cleaner. It secures structural assemblies within the chassis, holding panels, covers, and internal brackets in position during the cleaner’s continuous underwater operation.

What this screw does in the Dolphin

WN1412-pattern screws are thread-forming fasteners designed to cut their own mating thread directly into plastic bosses on first installation, eliminating the need for a pre-tapped hole. The KA50×25 designation fixes the nominal diameter at 5.0 mm and the shank length at 25 mm, giving sufficient grip depth for the plastic housings used across the EasyKleen’s frame. A2 stainless steel resists the continuous exposure to chlorinated water and pool chemicals that would corrode a standard carbon-steel fastener within weeks.

Which Dolphin models it fits

This screw is listed in the Dolphin EasyKleen exploded-view parts diagram. The same WN1412 A2 KA50×25 specification also appears in the Dolphin Moby parts list. If you are working on any other Dolphin model, cross-reference your exploded view against this part number before ordering — the KA50×25 shank is longer than the more common KA50×12 and KA50×20 variants and is not interchangeable with them.

Signs it needs replacing

A stripped or corroded screw will allow the fastened panel or cover to flex, rattle, or detach mid-cycle, exposing internal components to debris ingress or causing asymmetric brush pressure. If you find a boss cracked around a screw head, or if the fastener turns without resistance, replace both the screw and inspect the plastic boss for damage before reassembly.

How to install it

Drive the screw with a Phillips No. 2 bit at low torque — thread-forming screws in plastic bosses are easily over-driven, which strips the newly formed thread on the first turn past seating. Fit by hand first to confirm alignment, then drive to snug. No thread-locking compound is required for standard reassembly.