7/16-inch UNF Holden Chrome Trailer Mag Wheel Nut

Part No: 490251-MAG Category: Tag:


60 in stock

7/16″ UNF trailer wheel nuts are often used for Holden HQ, HT, and Commodore wheel stud pattern. The dome-style of wheel nut protects the end of you stud thread, unlike open-ended nuts.

“7/16-20” engraved on each nut.
✓ Chrome finish to provide longer rust protection.
✓ Often used for alloy wheels on caravans and trailers.

60 in stock

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7/16-inch UNF Holden Chrome Trailer Mag Wheel Nut

Mag wheel nuts are also known as dome nuts, lug nuts, or acorn nuts.

Along with aesthetics, mag wheel nuts serve a practical purpose which is to protect the end of your stud thread.

Most trailer hubs are supplied with open-ended wheel nuts, which will lock onto your stud if they become rusty. This makes standard nuts impossible to remove with a standard wheel brace and you will likely need a strong impact rattle gun.

Mag wheel nuts with a closed end are a better option for trailers, caravans, and campers operating in marine and/or off-road environments.

7/16-inch UNF Nut Specifications

Chrome wheel nuts are engraved with the thread: 7/16-20.

  • 19mm hex
  • 31mm overall length
  • 7/16″ UNF thread
  • 20 TPI (threads per inch)

Couplemate™ often supplies these mag wheel nuts to suit Holden stud patterns (such as Commodore, HT, and HQ).

Find more Wheel Nuts below


Additional information

Weight0.1 kg
Dimensions5 × 3 × 4 cm



1/2" UNF

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Couplemate™ is a manufacturer and vendor of high-quality towing, trailer, and caravan components. Couplemate™ Core Goods and Custom Work are guaranteed to be free of defects for the service lifetime of the product when used as intended.

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All Couplemate™ orders (online, over the phone, or in-store) have a 60 day period for change-of-mind returns and exchanges. There are some items that can’t be returned and some returns may incur a 15% restocking fee.

You can view our full policy for change-of-mind returns here.


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