The Multiquip 9503 is a genuine OEM Nyloc Nut 5/8-11 designed for use across a broad range of Multiquip equipment, including MQ62TDD, MQ62TK, QP4TKT, WT5HP, WT5C, EM120SM, EM900SD, LT6K, LT6KV, and MLT25DCA models. As a genuine OEM component, the 9503 is held to the same dimensional and material standards as the hardware originally installed at the factory. This fastener is a direct-fit replacement that installs without rework, keeping your equipment back in service quickly. Sourced and sold by DHS Equipment, this is the same part Multiquip specifies for authorized service work across these product families.
Key Features
- Genuine OEM Hardware Grade — Manufactured to Multiquip's thread and torque specifications, ensuring the nylon locking insert provides consistent prevailing torque retention under vibration.
- 5/8-11 Thread Specification — Correct thread pitch and diameter for a drop-in swap on all listed models; no chasing threads or sourcing adapters required.
- Wide Cross-Equipment Fitment — Verified for use on MQ62TDD, MQ62TK, QP4TKT, WT5HP, WT5C, EM120SM, EM900SD, LT6K, LT6KV, and MLT25DCA equipment.
- Vibration-Resistant Locking Design — The nylon insert resists loosening from engine vibration and operational movement, maintaining clamp load between service intervals.
- Critical Fastener Integrity — Using the correct OEM-specified nut on structural and drivetrain connections helps maintain proper torque values and prevents joint failure in demanding field conditions.
A nyloc nut, also called a nylon-insert lock nut, uses a nylon collar at the top of the nut to grip the bolt thread and resist loosening caused by vibration or cyclic loading. Unlike standard hex nuts, the nylon insert creates friction against the thread even when the joint is not under a compressive load, making it the preferred fastener choice in locations exposed to engine vibration, pump pulsation, or road movement. When a nyloc nut loses its locking effectiveness — whether through wear, heat exposure, or reuse past its service life — fasteners in those locations can back off, leading to loose assemblies, misalignment, or component damage. Replacing worn or compromised hardware with the correct OEM-specified part like the Multiquip 9503 restores the intended clamping integrity of the joint.
Part Details
| Part Number | 9503 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Nyloc Nut 5/8-11 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Trash Pumps | MQ62TDD |
| Water Trailer | WT5HP-WTE5HP-WT5HPSG |
| Essick Mixers | EM120SM |
| Essick Mixers | EM12M Series |
| Water Trailer | WT5C-WTE5C-WT5CSG |
| Trash Pumps | QP4TKT |
| Trash Pumps | MQ62TK |
| Towable Towers | LT6KV (60HZ) |
| Towable Towers | MLT25DCA |
| Towable Towers | LT6K |
| Essick Mixers | EM900SD |
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.
