Nut 7DN004
$1.99
Genuine Tacony OEM nut (part# 7DN004) used on the Tornado Marathon SE 900 (Model 98170) and Powr-Flite Prowler PFX900S tank assembly. Sized to its own fastener, so it belongs back on the joint it came off.
The Nut (part# 7DN004) is a genuine Tacony OEM replacement part from the recovery and solution tank assembly of the Tornado Marathon SE 900 self-contained carpet extractor. It is the nut specified for particular fastening points in the tank assembly.
What the Nut does
A nut is only half of a clamped joint, and the half that gets remembered. What actually holds a joint together is the tension stored in the bolt when it was tightened correctly, and the nut is what allows that tension to exist. Thread size, thread pitch and the flat bearing face all have to match for that tension to be developed evenly, which is why the correct nut matters even though almost any nut of the right thread will run on.
When to replace the Nut (7DN004)
Replace it when the thread is stripped, galled, or has been cut by an overtightened bolt, when the flats are rounded from being turned with the wrong tool, or when corrosion has seized it. A nut that binds partway down a clean thread is damaged and does not go back on.
Nut 7DN004 — fitment and installation notes
Refit whatever locking hardware came out with it and in the same order, since a plain nut in a vibrating joint will find its way loose on its own. Hold the bolt head to stop it turning while tightening, so the load goes into clamping the joint rather than scuffing the parts as the bolt spins. Tacony builds the Tornado Marathon SE 900 and the Powr-Flite Prowler PFX900S on a single machine platform, so this component carries across both brands rather than belonging to either one. It is a shared Tacony component and may fit additional models beyond those listed — call us and we will confirm against your serial number.
Compatible Models for the Nut
- Tornado Marathon SE 900 — Model 98170
- Powr-Flite Prowler PFX900S
- Powr-Flite PFX900SG
Twin City Vacuum has been selling and servicing commercial floor-care equipment since 1956 from 5415 West Broadway, Crystal, MN 55428. We stock genuine Tacony parts and ship nationwide. Browse the full Tornado 98170 parts catalogue, or see the manufacturer at tornadovac.com.
Frequently Asked Questions
What does the Nut do on the Tornado Marathon SE 900?
A nut is only half of a clamped joint, and the half that gets remembered. What actually holds a joint together is the tension stored in the bolt when it was tightened correctly, and the nut is what allows that tension to exist. Thread size, thread pitch and the flat bearing face all have to match for that tension to be developed evenly, which is why the correct nut matters even though almost any nut of the right thread will run on.
How do I know if my Nut needs replacing?
Replace it when the thread is stripped, galled, or has been cut by an overtightened bolt, when the flats are rounded from being turned with the wrong tool, or when corrosion has seized it. A nut that binds partway down a clean thread is damaged and does not go back on.
What models is the Nut (part# 7DN004) compatible with?
The Tornado Marathon SE 900 (Model 98170), the Powr-Flite Prowler PFX900S and the PFX900SG. It is a shared Tacony part and may fit further models; call us to confirm.
How do I order the Nut (part# 7DN004) or get help?
You can add the Nut (part# 7DN004) directly to your cart on this page, or call us at 763-535-0770. Our staff at 5415 West Broadway, Crystal, MN 55428 has been servicing Tornado equipment since 1956 and can help confirm the right part for your machine.
