Nyloc Nut X8237

The Nyloc Nut (part# X8237) is a genuine Tacony OEM replacement part from the brush assembly of the Tornado Marathon SE 900 self-contained carpet extractor. It is the nylon-insert locking nut that resists loosening on brush assembly fasteners.

What the Nyloc Nut does

The nylon collar in the top of the nut is not threaded when it is made. The bolt cuts its own path through it on first assembly, and the grip of that deformed nylon against the thread is what stops the nut backing off. It is a good match for the brush assembly because it holds against constant vibration without needing a lock washer, and it does not depend on a clean, flat bearing face to work.

When to replace the Nyloc Nut (X8237)

Replace it every time it is removed, and immediately if it can be run down the thread by hand. Also replace it if the nylon looks glazed, melted or is missing, since a nyloc that has been heated has lost the property it was bought for.

Nyloc Nut X8237 — fitment and installation notes

Do not reuse it, however good it looks; the nylon takes its shape once and gives most of its grip on the first fitting. Make sure the bolt protrudes fully through the nylon collar, and tighten to a firm seat rather than leaning on it, because the locking comes from the insert and not from torque. 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 Nyloc 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 Nyloc Nut do on the Tornado Marathon SE 900?

The nylon collar in the top of the nut is not threaded when it is made. The bolt cuts its own path through it on first assembly, and the grip of that deformed nylon against the thread is what stops the nut backing off. It is a good match for the brush assembly because it holds against constant vibration without needing a lock washer, and it does not depend on a clean, flat bearing face to work.

How do I know if my Nyloc Nut needs replacing?

Replace it every time it is removed, and immediately if it can be run down the thread by hand. Also replace it if the nylon looks glazed, melted or is missing, since a nyloc that has been heated has lost the property it was bought for.

What models is the Nyloc Nut (part# X8237) 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 Nyloc Nut (part# X8237) or get help?

You can add the Nyloc Nut (part# X8237) 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.