Is the size based on the nut or the stud?

It is the size of the head on the wheel stud or nut that the loose nut indicators would attach to. Find a metric socket that fits and you found the size you need. Most semi trucks are 21m I believe. I have 7 in my fleet from 3 different manufactures and these worked for all 7 trucks.

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🚨 Don’t let loose nuts drive your downtime — CheckMate your wheels with confidence!

SAFETY SIMPLIFIED - A cost-effective, foolproof step to prevent dangerous wheel-off accidents.
FLEET READY BULK PACK - 100 indicators per pack to keep your entire fleet road-safe and inspection-ready.
EFFORTLESS INSTALLATION - Snap-on design makes fitting and removal quick and hassle-free.
HIGH VISIBILITY ASSURANCE - Bright yellow polyurethane ensures quick, clear safety checks every time.
INSTANT LOOSE NUT DETECTION - Align indicators to spot wheel nut loosening before it’s too late.

The AME INTL CheckMate Loose Wheel Nut Indicator is a universal 33mm yellow polyurethane marker designed to visually signal loosening wheel nuts. Sold in convenient 100-packs, it offers a simple, high-visibility solution to prevent wheel-off accidents by aligning indicators to detect torque loss early, making safety inspections faster and more reliable for professional fleets and vehicle managers.

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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Fantastic experience overall. Will recommend to friends and family.

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Manufacturer	AME Intl
Brand	ameintl
Model	CheckMate
Product Dimensions	7.62 x 4.45 x 0.64 cm; 249 g
Item model number	62400
Exterior	Molded
Special Features	Easy to use, High Visibility, Multiple sizes available
Item Dimensions L x W x H	7.6 x 4.4 x 0.6 cm
Voltage	12 Volts
Color	yellow
Item Weight	249 g

AME INTL CheckMate Loose Wheel Nut Indicator - 33mm Yellow

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