Tornado Screw M4 x 22 K73030960

The M4 x 22 screw (part# K73030960) is the vacuum-motor fastener used on several Tornado machines, including five per motor on the Zephyr.

This is a genuine Tacony OEM part for the Tornado Zephyr. On the factory parts sheet it sits in the main unit assembly, callout 26 (five used).

Compatible Models for the Screw M4 x 22 K73030960

• Tornado: TV570-Q03-U Zephyr cordless backpack vacuum
• Tornado: 91415 15″ CV 38/2 HEPA filter upright vacuum
• Tornado: 91419 19″ CV 48/2 HEPA filter upright vacuum

This one is shared. PartSmart lists it on three Tornado machines — the Zephyr and the CV 38/2 and CV 48/2 HEPA uprights — which is why the title carries no model. Five are used on the Zephyr’s vacuum motor.

What the screw m4 x 22 does

It clamps the motor to its mounting through the compliant seals that isolate motor vibration from the body. That is why the length matters: too short and it does not reach the thread, too long and it bottoms out before the joint is clamped.

Signs it needs replacing

Replace any screw with a rounded drive or a damaged thread, and replace the set whenever a motor is refitted. A motor held by five screws where one is chewed is a motor that will come loose.

Installation and fit

Start each screw by hand, then tighten in an even pattern rather than one at a time, so the motor pulls down flat on its seals. No impact tools.

Frequently Asked Questions

How many does the Zephyr use?

Five on the motor. They are sold individually.

Does it fit other Tornado machines?

Yes — PartSmart lists it on the Zephyr and on the CV 38/2 (91415) and CV 48/2 (91419) HEPA uprights.

Can I reuse the old screws?

If the drive and thread are clean, yes. If one is chewed, replace the set — they are pennies.

Is there a torque figure?

None published. Even, firm, by hand — the motor should sit flat without crushing its seals.