Multiquip 5283 Nyloc Nut 5/16-18

The Multiquip 5283 is a genuine OEM Nyloc Nut 5/16-18 designed for a broad range of Multiquip and Whiteman equipment, including Water Trailer models WT5C, WTE5C, WT5HP, and WTE5HP, hydrostatic and mechanical ride-on trowels such as the MD80, MD105, HTX44K4, HTX44K5, STX6H, and STXDF, flat saws and pavement saws across the SP and PS series, masonry saws including MP and MS models, light towers, screeds, and walk-behind trowels. As an authentic Multiquip OEM part, 5283 is sourced directly from the original manufacturer to ensure the correct thread pitch, locking performance, and dimensional fit across every compatible application. DHS Equipment stocks this fastener and ships promptly to keep your fleet operational.

Key Features

• Nylon-Insert Locking Thread — The integrated nylon collar grips the mating bolt thread under vibration, resisting self-loosening in high-cycle and high-vibration applications typical of compaction, finishing, and cutting equipment.
• Genuine OEM Sourcing — Manufactured to the same material grade and dimensional specification as the original hardware, ensuring correct torque retention and clamping force without substitution compromises.
• 5/16-18 UNC Thread Form — Standard unified coarse thread pattern drops straight onto existing 5/16-18 fastener locations with no chasing or re-tapping required.
• Broad Cross-Family Compatibility — A single part number covers ride-on trowel families (MD, HTX, STX), Water Trailer models (WT5C, WTE5C, WT5HP, WTE5HP), SP/PS flat and pavement saws, MP/MS masonry saws, light towers, screeds, and walk-behind trowels — simplifying parts inventory across a mixed fleet.
• Corrosion and Vibration Resistance — The nylon insert also provides a secondary barrier against moisture ingress into the thread engagement zone, extending the service life of the fastener joint in outdoor and wet-weather operating conditions.

A Nyloc nut — also called a nylon-insert lock nut — uses a deformable nylon ring pressed into the top of the nut body. When threaded onto a bolt, the nylon deflects around the thread form, creating mechanical interference that prevents the nut from backing off under vibration or dynamic loading. This locking action is critical on equipment like ride-on trowels, water trailers, and saws, where engine or blade vibration cycles continuously try to work fasteners loose. A missing or worn locking nut can allow structural or guard panels, blade assemblies, or trailer hardware to shift or detach, leading to accelerated wear on mating components and potential safety concerns. Replacing a compromised locking nut with the correct OEM 5283 restores the joint's designed clamping integrity immediately.

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.