The Multiquip 9091 is a genuine OEM Hex Head Flange Screw 5/16-18 x 1" GR5 designed for a wide range of Multiquip and Whiteman equipment including water trailers, flat saws, ride-on roller screeds, and ride-on power trowels. As a factory-sourced fastener, the 9091 meets the exact thread pitch, grip length, and grade specification called out in the original equipment design. This screw fits models including WT5C, WTE5C, WT5CSG, SP118, WRSPUDF, WRS5200, WRS5200DFPU, HHNG5, HHXDF4, HHXDF5, HHXD5, HHXD5-ES, HHXG5, EHHNK5, WT5HP, WTE5HP, WT5HPSG, WSC55, LT6K, and SP2S20H. Sourcing the correct OEM fastener keeps critical assemblies torqued to spec and prevents the damage that comes from substituting incorrect grades or thread sizes.
Key Features
- Grade 5 Tensile Strength — Meets ASTM Grade 5 requirements, providing the clamping force and shear resistance needed for structural and mechanical assembly points across Multiquip equipment.
- Flange Head Design — The integrated flange distributes clamping load over a wider bearing surface, eliminating the need for a separate flat washer and reducing the risk of loosening under vibration.
- Correct Thread Specification — 5/16-18 UNC thread form and 1" grip length match the original fastener spec exactly, ensuring full thread engagement in mating components without bottoming out or cross-threading.
- Broad Cross-Equipment Fitment — A single OEM part number covering water trailers (WT5C, WTE5C, WT5HP series), flat saws (SP118, SP2S20H), roller screeds (WRS5200, WRSPUDF), and ride-on trowels (HHNG5, HHXD5, HHXG5 series).
- Genuine OEM Sourcing — Supplied directly from Multiquip's parts program, so the alloy composition, thread tolerances, and surface treatment are identical to the fasteners used during original assembly.
A hex head flange screw is a threaded fastener that combines a standard hex bolt head with a wide, circular flange built into the underside of the head. The flange acts as an integrated washer, spreading the clamping load across a larger surface area to reduce the chance of the fastener pulling through or loosening over time — particularly important on equipment that generates significant vibration during operation. Using the correct grade and size fastener matters because an underspecified bolt can stretch, shear, or back out under load, causing misalignment or component separation that leads to more serious mechanical failures.
Part Details
| Part Number | 9091 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Hex Head Flange Screw 5/16-18 x 1" GR5 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Water Trailer | WT5C-WTE5C-WT5CSG |
| Saws | SP118 |
| Ride-On Roller Screeds | WRSPUDF |
| Ride-On Roller Screeds | WRS5200 |
| Whiteman Ride-On Power Trowels | HHNG5 |
| Whiteman Ride-On Power Trowels | HHXDF4-DF5 |
| International Ride-On Power Trowels | EHHNK5 |
| Water Trailer | WT5HP-WTE5HP-WT5HPSG |
| Chemical Spray Systems | WSC55 |
| Towable Towers | LT6K |
| Ride-On Roller Screeds | WRS5200DFPU |
| Whiteman Ride-On Power Trowels | HHXD5-ES |
| Whiteman Ride-On Power Trowels | HHXG5 |
| Whiteman Ride-On Power Trowels | HHXD5 |
| Saws | SP2S20H |
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.
