Maytronics Dolphin C6 screw KA50×20 MTIL - 3379720-A

Maytronics Dolphin C6 screw KA50×20 MTIL

This is a genuine Maytronics replacement fastener — a KA50×20 MTIL self-tapping screw used to secure key assemblies within the Dolphin C6 and a wide range of compatible Dolphin robotic pool cleaners. With a nominal diameter of KA50 (5.0 mm) and a 20 mm shank length, it provides correct thread engagement and reliable clamping force in the moulded housings and panels of these robots.

Function and role within the cleaner

Screws of this type fasten cover panels, brush assemblies, drive-train components and other structural subassemblies to the robot’s main frame. A single stripped, corroded or missing fastener can allow a panel to flex, misalign a brush cartridge, or admit debris into a sealed compartment — all of which degrade cleaning performance and accelerate wear on adjacent parts.

Compatibility

Part number 3379720-A appears across an exceptionally broad range of Dolphin bill-of-materials diagrams. Confirmed fits include the Dolphin C6, 2×2 C6 Plus, M400, PROX2, C3, C4, C5, 2×2, 2×2 Gyro, Nautilus, Nautilus CC Plus, Triton, Triton Plus, Wave 50, Wave 65, Wave 75, Wave 90, DX4, DX5, DX5 Plus, DX6, Apollo, Neptune Plus, Edge, Explorer, Advantage, Advantage Plus, M200, Oasis Z5, and several Pentair Prowler variants among others. Always verify against your robot’s exploded-parts diagram before ordering.

When to replace this screw

Replace immediately if the screw head is stripped and no longer accepts a driver bit, if the thread shank is visibly corroded or seized, or if a fastener has been lost during a service procedure. A loose panel rattling against the pool wall or a brush cover that will not sit flush are classic signs that a KA50×20 fastener needs attention.

Why genuine Maytronics parts matter

Maytronics manufactures this screw to the original dimensional specification, ensuring correct thread pitch, shank hardness and corrosion resistance for continuous immersion in chlorinated or salt water. An off-brand substitute with even marginally different thread geometry can strip the moulded boss on the first assembly, turning a minor maintenance task into a costly housing repair.