Wacker Neuson 5100058776 Din 6797 Lock Washer A4.3 A2c

The Wacker Neuson Din 6797 Lock Washer A4.3 A2c is a genuine OEM component designed for PT6Y and PT6YT series pumps. Sourced directly from Wacker Neuson, this lock washer carries the same part specification as the original hardware installed at the factory, ensuring a true like-for-like replacement. It is confirmed to fit multiple PT6Y and PT6YT configurations, including EPA T4 variants, so you can order with confidence knowing the fitment has been verified against the manufacturer's own parts data.

Key Features

• Genuine OEM Specification: — Manufactured to the exact DIN 6797 standard, delivering the correct tooth profile and spring tension required to hold fastener torque under vibration.
• Direct Hardware Match: — Sized at A4.3 to drop straight onto the correct bolt shank diameter with no reworking or shimming needed.
• Broad PT6Y and PT6YT Compatibility: — Fits PT6Y and PT6YT series pumps across multiple build codes, including EPA T4-compliant variants.
• Vibration Resistance: — The toothed lock washer design bites into mating surfaces to resist loosening during pump operation, helping fastened joints stay tight through extended run cycles.
• Corrosion-Resistant Grade: — A2 stainless construction stands up to wet, muddy, and chemically active environments typical of dewatering and pump applications.

A lock washer sits between a fastener and its mating surface to prevent the bolt or nut from backing out under the vibration and cyclic loading a pump generates during operation. The toothed or serrated edge of a DIN 6797 type washer digs into both the fastener face and the clamped surface, creating mechanical resistance against rotation. When a lock washer wears flat, loses its spring, or is omitted entirely, fasteners can work loose over time — leading to misaligned components, fluid leaks, or structural failures that are far costlier to address than a simple hardware replacement.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.