A teenager has admitted attacking a Waikato milk tanker with a hammer at a late night boy racer gathering.

However, the 18-year-old gets to keep his identity a secret, at least for now.

He appeared in the Hamilton District Court on Thursday where, though his counsel Eilidh Hook, he pleaded guilty to charges of intentionally damaging a Volvo truck, the property of Fonterra; and disorderly behaviour in a public place.

A charge of possession of an offensive weapon, namely a claw hammer, was withdrawn by the police.

The teenager, who lives in Hamilton, was granted continued name suppression until his sentencing on July 27, where he will apply for a discharge without conviction.

If that application proved successful, Hook said she would apply for his name to be permanently suppressed.

Two other people, aged 17 and 19, have been arrested and charged over the fracas, which took place in the early hours of Saturday, March 19.

The alleged incident happened about 1.20am on Saturday, March 19, near the intersection of Stokes and Orini roads in the rural Waikato.

The rural crossroads is a well-known spot for street racers to park up and do burnouts at the weekend.

Videos circulating on social media show a large group of people surrounding a milk tanker apparently attempting to pass through the crowd. A milk valve is open and milk is spilling onto the roadway.

According to police, a 'significant” amount of milk was emptied from the tanker onto the road.

The 17-year-old is facing charges of unlawful possession of an imitation firearm, inciting disorderly behaviour and sustained loss of traction.

The 19-year-old has been charged with sustained loss of traction.

-Stuff/Mike Mather.