Wacker Neuson 5000157020 1/4-20X.5 Hex Serrated Flange Screw Zp

The Wacker Neuson is a genuine OEM 1/4-20X.5 Hex Serrated Flange Screw Zp designed for the RD11A and RD11V hydrostatic double drum vibratory tandem rollers. As a direct factory replacement, this fastener is sourced from Wacker Neuson's authorized parts supply, ensuring it matches the original specification used during assembly. It installs in place of the existing screw without modification, maintaining the structural and mechanical integrity of the assembly it secures. Confirming part number against your machine's serial number before ordering is always recommended to ensure an exact match.

Key Features

• Genuine OEM Fastener Specification — Manufactured to the exact thread pitch, head geometry, and zinc-plated finish of the original screw, ensuring correct clamp load and corrosion resistance in the field.
• Serrated Flange Design — The integrated serrated flange bites into the mating surface during installation, providing vibration-resistant locking without the need for a separate lock washer.
• Direct-Fit Replacement — Sized 1/4-20 x 0.5 inch to drop straight into the existing threaded bore, maintaining the original bolt pattern and torque requirements of the assembly.
• Built for Tandem Roller Conditions — Zinc-plated (Zp) finish offers corrosion protection suited to the wet, abrasive operating environment of asphalt and soil compaction work.
• Fits RD11A and RD11V Tandem Rollers — Confirmed compatible with both the RD11A and RD11V hydrostatic double drum vibratory roller models.

A hex serrated flange screw serves as a vibration-resistant fastener within the machine's assembly, combining a standard hex-drive head with an integral serrated flange that acts as a built-in locking element. The serrations grip the mating surface when torqued down, preventing loosening caused by the constant vibration produced during compaction operations. When this type of fastener wears, corrodes, or is cross-threaded, it can compromise the integrity of the joined components, potentially leading to misalignment or loosening of critical assemblies on the roller.

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.