carriage bolt

(noun, USA/SAE Standard) A bolt having a round head with a square, ribbed, or fluted boss underneath it. The function of the boss being to bite into timber to prevent the bolt turning while the nut is being tightened.

This term is often, and wrongly, considered interchangeable with "coach bolt", which is UK/Australian slang for a lag bolt. This may seem a trivial inconsistency to the layman, but is a mixup which has cost innumerable companies lots of money and confused a huge number of people.
One may perform a quick test to determine whether an item is a carriage bolt or lag bolt/lag screw: Is it driven (tightened) by its head or can only nuts be driven up it? If the former, it's a carriage bolt, if the latter, it's probably a lag bolt.

Origin: Old French cariage, from carier ‘carry’; bolt (unchanged), Old English. There is no reliable information as to whether the carriage bolt got its descriptor through the manufacture of carriages/coaches or whether 'carriage' refers to the fact that such a bolt is a load-bearing item.

Goddamn, I hate these translated instruction manuals. This thing just tried to tell me to use a screwdriver to tighten a carriage bolt!

carriage bolt by Ike January 26, 2005

Get merch

Get the carriage bolt mug.

See more merch

Carriage-Cruiser

In my small town of 300 people we have a group of new mothers who push their baby carriages around the town for exercise. Our town now call them the Carriage-Cruisers

There goes the new town carriage-cruisers down the road pushing their babies in strollers.

Carriage-Cruiser by KRYSANN October 18, 2006

Get merch

Carriage Hills Kids

A group of 6 girls who all live/have lived in Carriage Hills, who have known each other since...forever.

Also called "the Posse".

They are:
TNT
Smitherings
Celesticles
Jadeypadey
Ray-Ray
and Sammie, who does not have a cool nickname and lives in Nigeria.

Ray-Ray and Smitherings started it with their friendship since the ages of either 3 or 4. They were then made into the Original Trio when TNT joined forces with them around kindergarden. Celesticles joined with her friendship to Smitherings in the first grade and has been there ever since. Even though there was the big fight between her and TNT in either 3rd or 4th grade, they are now best friends. Jadeypadey and Sammie both joined in 3rd grade when they were both in Smitherings and Celesticles class. Jadeypadey and Celesticles live across the street from one another.

The Posse was really official in the 7th grade with the start of Tradition, which was then going to Sonic every Friday. However, over the years, it has progressed into going to Wendy's and Wal-Mart every Friday.

Sammie moved to Nigeria on August 1st of 2006, but she has not been expelled from the Posse. She will be returning.

"Yeah, my friends are the best. They're the Carriage Hills Kids :D"

Carriage Hills Kids by Ray-Ray!!!!!!!!!!!! December 15, 2008