Tornado Screw #10-32 x 5/8″ 30436

#10-32 is the fine thread in a size where the machine also uses #10-24 coarse. That single fact causes more damage on this chassis than any other fastener mix-up. Part number 30436 is the genuine OEM #10-32 by 5/8 inch screw.

Compatible Models for the Screw #10-32 x 5/8″

This part fits the following Tornado machines:

• Tornado 98164 MWH-800 8-Gallon Self-Contained Carpet Extractor
• Tornado 98166 20″ Marathon 800 Carpet Extractor (8 Gallon, 115V)
• Tornado 98167 20″ Marathon 800 Carpet Extractor (8 Gallon, 230V)
• Tornado 98168 12 Gallon Self Contained Carpet Extractor
• Tornado 98168 20″ Marathon 1200 Carpet Extractor (12 Gallon, 115V) — all series
• Tornado 98169 20″ Marathon 1200 Carpet Extractor (12 Gallon, 230V)

A #10-24 screw will start in a #10-32 hole. It will turn, it will feel like it is engaging, and it will cut its way in and destroy the thread it was never meant to be in. The damage is done in the first few turns and is not recoverable without a thread insert. If a screw in this size feels gritty going in rather than smooth, stop and check which thread you are holding.

Telling them apart is easy once you look: the fine thread has visibly more turns per inch and a shallower crest. Count them against a known-good screw if you are not sure. It takes ten seconds and it is the difference between a repair and a thread repair.

Fine threads are also less tolerant of dirt and damage. A single flattened crest will bind, and forcing it from that point strips the female thread rather than clearing the obstruction. Clean the hole and the screw before assembly and run the screw in by hand until the head is close before reaching for a driver.

Inspect before refitting. Fine threads show wear sooner than coarse ones because there is less material in each crest, so a used #10-32 with dulled threads should be replaced rather than reused.

Fit to a modest torque. The fine thread gives more clamping force for the same effort, which means it is also easier to over-tighten and strip. Firm is enough.

Browse every assembly for this machine on the Tornado 98168 Marathon 1200 parts hub, and see the manufacturer’s range at tornadovac.com.

Frequently Asked Questions

What Tornado machines does the screw 30436 fit?

It is used on the Tornado 98164 MWH-800 8-gallon self-contained extractor, the 98166 and 98167 20″ Marathon 800, the 98168 12 Gallon Self Contained extractor and the 98168 20″ Marathon 1200 in all series. Call 763-535-0770 with your model number if you are not sure.

Why does the #10-32 fine thread matter so much?

Because this machine also uses #10-24 coarse in the same nominal size, and a coarse screw will start in a fine hole, turn, feel like it is engaging, and cut its way in. The thread is destroyed in the first few turns and cannot be recovered without an insert.

How do I tell #10-32 from #10-24?

Look at the turns per inch. The fine thread has visibly more of them and a shallower crest. Count against a known-good screw if in doubt. Also trust the feel: a screw that goes in gritty rather than smooth in this size is usually the wrong thread.

How do I order the Screw #10-32 x 5/8″ (part# 30436) or get help?

You can add the Screw #10-32 x 5/8″ (part# 30436) 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.

Questions? Call us at 763-535-0770 or visit us at 5415 West Broadway, Crystal, MN 55428.