CleanMax CM-WAV 1/4 ID Internal-Tooth Washer 7CY002
$2.99
Genuine Tacony CleanMax CM-WAV 1/4 ID internal-tooth lock washer (part# 7CY002) — resists loosening and aids grounding. Fits the CleanMax CM-WAV. In stock, Crystal MN. Call 763-535-0770.
The CleanMax CM-WAV 1/4 ID Internal-Tooth Washer (part# 7CY002) is a 1/4-inch internal-tooth lock washer used on the CM-WAV wide-area vacuum where a fastener must resist loosening and, often, make a clean electrical ground.
Compatible Models for the Internal-Tooth Washer
- CleanMax CM-WAV Wide Area Vacuum (wide-track commercial upright)
This is a genuine Tacony hardware item used on the CleanMax CM-WAV. The same size fastener may appear on other Tacony machines; call 763-535-0770 if you would like us to confirm the exact part for your model.
What the Internal-Tooth Washer does
The teeth of an internal-tooth washer bite into the fastener and the mating surface as the joint is tightened, which both resists vibration loosening and cuts through paint or oxide to make solid metal-to-metal contact. That second job makes this style of washer common at ground connections and at bracket joints on a machine that vibrates constantly in commercial use.
Signs the Internal-Tooth Washer needs replacing
Replace this washer if its teeth are flattened or corroded so it no longer bites, or whenever the joint it secures has been apart — a tooth washer works best fresh. A ground or bracket connection that keeps loosening, or an intermittent electrical fault at a grounded point, can trace to a tooth washer that has lost its grip.
Installation and fit
Place the new 7CY002 washer under the fastener so its teeth contact both the fastener and the mating surface, and tighten to let the teeth set into the metal. On a ground connection, make sure the contact surface is clean so the teeth can bite. Twin City Vacuum has sold and serviced CleanMax equipment since 1956, and every part is sourced directly from Tacony. Browse more CleanMax parts, or learn more at CleanMax.
Frequently Asked Questions
What does the Internal-Tooth Washer do on the CleanMax CM-WAV?
Its teeth bite into the fastener and mating surface to resist vibration loosening and, at ground points, to make clean metal-to-metal electrical contact.
How do I know if my CM-WAV tooth washer needs replacing?
Replace it if the teeth are flattened or corroded so it no longer bites, or whenever the joint has been apart. A joint or ground that keeps loosening is a sign.
What models is the Internal-Tooth Washer (part# 7CY002) compatible with?
The Internal-Tooth Washer (part# 7CY002) is listed for the CleanMax CM-WAV wide-area commercial upright. If you run a different CleanMax model and are unsure whether this part fits, call 763-535-0770 and we will confirm it against your machine.
How do I order the Internal-Tooth Washer (part# 7CY002) or get help?
You can add the Internal-Tooth Washer (part# 7CY002) 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 CleanMax equipment since 1956 and can confirm the right part for your CM-WAV.
Questions? Call us at 763-535-0770 or visit 5415 West Broadway, Crystal, MN 55428.



