28 mm Torque-Tight™ Lug Nut Indicators (also fits 1-1/8")

Our 28 mm Torque-Tight™ loose lug nut indicators provide a fast, visual way to confirm wheel nut movement on Class 3–5 trucks and specialty equipment. Because sizes around this range are close (27–29 mm), measuring correctly is critical. If you’re unsure, check our How to Measure guide before ordering.

Cross-size note: 28 mm across-flats is commonly paired with a 1-1/8" socket. These indicators are designed to fit standard 28 mm hex nuts and most 1-1/8" hex nuts of the same profile.

Key Features

• High-visibility pointer makes loose movement obvious during walkarounds and DOT inspections.
• 24 locking positions for precise alignment on the hex.
• Interference fit grips the nut firmly yet installs/removes by hand.
• Heavy-duty LDPE, approx. 1/8" thick, built for daily fleet use.
• Performs in extreme temps (heat and deep cold) and harsh conditions.
• Colored pigment throughout for durability (no surface coating to scratch off).
• Made in the USA with a 2-year warranty.
• Custom colors available for fleet programs (MOQ applies).

Common Vehicles & Applications for 28 mm

• Small transit buses
• Some school buses (inverted flange)
• Caterpillar equipment
• Komatsu loaders
• Hitachi excavators
• Mining trucks
• Oilfield rigs and support vehicles

Sizing & Fitment

Order by the across-flats size of the hex nut (not the stud diameter). If you don’t have the right socket handy, use calipers and measure directly across the flats.

1. Measure the hex across the flats — not point-to-point.
2. Confirm whether the nut is metric (mm) or inch sized.
3. If your reading is near 28 mm and you typically use a 1-1/8" socket, this size is likely correct.

Still unsure? See our step-by-step How to Measure guide or request a free sample to verify fit on your equipment.

Quick Install

1. Clean the nut face and surrounding area.
2. Press the indicator onto the hex until fully seated.
3. Align all pointers in the same direction around the wheel for an easy visual reference.

Prevent wheel-off incidents with a simple visual check. Add 28 mm Torque-Tight™ indicators to your cart or request bulk pricing for your fleet.