• 21mm Torque-Tight™
  • 21mm Torque-Tight™
  • 21mm Torque-Tight™
  • 21mm Torque-Tight™
1 7

Torque-Tight

21mm Torque-Tight

$12.00 USD
$12.00 USD
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Package Size

IND21MM-ORN-10

21mm Torque-Tight™ Lug Nut Indicators

21mm Torque-Tight™ loose lug nut indicators are used in some Class 1 and Class 2 truck applications. These smaller trucks are often tasked with making frequent stops throughout the workday. With Torque-Tight™ installed, drivers can quickly and visually check lug nuts during routine walkarounds, reducing the risk of wheel-off accidents.

Why Torque-Tight™ Is Different

Each Torque-Tight™ indicator is cut to a teardrop shape with 24 locking teeth that create an interference fit on standard hex nuts. Our indicators are designed to be more than twice as large as typical competitors, making them highly visible during inspections and walkarounds.

Torque-Tight™ indicators are available in three standard colors—green, orange, and black—and custom colors are available with minimum orders. 

Key Features

  • Colored pigment throughout for durability
  • Lowest cost, highest quality in the industry
  • 24 locking positions for easy placement
  • Heavy-duty LDPE construction
  • Injection molded for a precise fit
  • 1/8" thickness for strength
  • Resistant to extreme heat and cold
  • Backed by a 2-year warranty
  • Custom colors available on request

Vehicles That Commonly Use 21mm

Known applications for 21mm Torque-Tight™ indicators include:

  • Ford F-450 (model year may vary)
  • Ford F-550 (model year may vary)
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Why Fleets Choose Torque-Tight

  • Made in the USA with consistent molding quality
  • Injection-molded for precise fit and long life
  • Color is molded through the part, never painted
  • UV-stable polyethylene resists fading and cracking
  • 1/8 inch thick for durability and secure fit
  • Two-year warranty

How Drivers & Technicians Use Them

  1. Install all indicators pointing the same direction.
  2. During pre-trip, look for any indicator rotated outward.
  3. Any rotation indicates a lug nut requiring immediate service.

Temperature & Environment Performance

Torque-Tight indicators are molded from a high-performance LDPE resin designed for long-term outdoor use. The material remains stable across brake heat cycles, winter cold, UV exposure, and chemical contact.

  • Operating environment: −40°F to over 250°F
  • Short-duration heat tolerance well above typical brake drum temperatures
  • UV-stable colorant prevents fading
  • Resistant to oils, grease, salt, and de-icer chemicals

Why We Don’t Use Biodegradable Plastics

Some indicator brands use biodegradable or oxo-degradable plastics. These materials are not recommended for heavy truck environments because they can lose strength when exposed to sunlight, heat, vibration, and road chemicals.

A wheel-end safety device should not degrade outdoors. Torque-Tight indicators use an engineering-grade LDPE chosen for durability, long service life, and consistent performance.

Fleet / Bulk Ordering Information

  • Bulk pricing & custom colors available for 5,000+ piece orders
  • Packing options for axle sets, small fleets, and full fleet deployment
  • W9 available on request
  • Purchase orders accepted for approved accounts

Let customers speak for us

from 19 reviews
Very fast delivery

Very fast delivery helped us get our customer their trailer back sooner than
we predicted.

Marty Nussbaum
1" Torque-Tight
1" Torque-Tight
Excellent customer service

They went above and beyond to assure my order went out same day for overnight delivery. Super friendly and helpful!!

Anonymous
33mm (1-5/16") Torque-Tight
33mm (1-5/16") Torque-Tight
Works as expected

Works as expected. No complaints.

Anonymous
21mm Torque-Tight
21mm Torque-Tight
Good idea

That's a great idea, who would ever think something so small could be so valuable

Herman
22mm (7/8") Torque-Tight
22mm (7/8") Torque-Tight
Perfect

Easy to install, simple, and quick. Best way to save thousands of dollars in tires.

Kevin Krentz
4-Pack Skid-Stopper Trailer Wheel Skid Indicators with M22x1.5 Jam Nuts
4-Pack Skid-Stopper Trailer Wheel Skid Indicators with M22x1.5 Jam Nuts
Black replacement

Thanks for finding the black torque tight flags. I had bought the whole set for my bus conversion and lost or (?) one, thanks again tom...

Tom Vannozzi
1-1/2" (38mm) Torque-Tight
1-1/2" (38mm) Torque-Tight
great product

We use these on f 550 and they are the only loose wheel indicators that we have found that we can still check torque on the lug nuts without removing the indicators. And they stay on no matter what kind of areas we drive through.

cris Kendrick
21mm Torque-Tight
21mm Torque-Tight
Fast

Super fast shipping...item as describe...thanks

Cesar Chavez
4-Pack Skid-Stopper Trailer Wheel Skid Indicators with M22x1.5 Jam Nuts
4-Pack Skid-Stopper Trailer Wheel Skid Indicators with M22x1.5 Jam Nuts

They do what they are intended to do!

Jim Brock
33mm (1-5/16") Torque-Tight
33mm (1-5/16") Torque-Tight
Work as Intended

Easy application, easiest thing I purchased for my mechanic to do.

Keith Lester
4-Pack Skid-Stopper Trailer Wheel Skid Indicators with M22x1.5 Jam Nuts
4-Pack Skid-Stopper Trailer Wheel Skid Indicators with M22x1.5 Jam Nuts

QUICK SHIPPING AND QUALITY FIT

Patrick Alford
33mm (1-5/16") Torque-Tight
33mm (1-5/16") Torque-Tight

22mm (7/8") Torque-Tight™

SHAWN RILEY
22mm (7/8") Torque-Tight
22mm (7/8") Torque-Tight
Perfect Service

Excelent service !

Luis Rivera
33mm (1-5/16") Torque-Tight
33mm (1-5/16") Torque-Tight
Lug Nut Indicators

Easy to use, fit perfectly, and the best part - everyone on my team loved the idea of using them right away. They made their life easier (less crouching) and safer.

Fast shipping, good price, and made in USA, I'll definitely keep buying from Torque-Tight for my fleet!

Jeff T.
33mm (1-5/16") Torque-Tight
33mm (1-5/16") Torque-Tight

Excelente producto y servicio

Luis Rivera
21mm Torque-Tight
21mm Torque-Tight