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Glite Dictionary
carriage bolt

carriage bolt

1 6.7
A metal rod with a round head and partial threads used to join wood through a hole
  • noun
  • /ˈkɛrɪdʒ boʊlt/
  • Specialized
translation icon : perno de carro
  • The construction requires at least ten carriage bolts to hold everything securely in place.
  • carriage bolts and nuts
  • galvanized carriage bolts
  • use carriage bolts

Examples

  • Now that we have both holes drilled, we'll then attach our spacer block and carriage bolt to the fish wire and pull it back through the frame out of the hole that we drilled.

    Blog text (17)

  • We'll be using the carriage bolt, the square spacer block, and our fish wire.

    Blog text (17)

  • We can then slide the spacer block on and screw the carriage bolt to the fish wire.

    Blog text (17)

  • We'll then pull the spacer block and the carriage bolt through the frame and out the mounting bolt hole location.

    Blog text (17)

  • Insert a 2" carriage bolt in each hole with the head of the bolt on the front of the easel and tighten with a washer and nut until the head of the bolt is flush with the plywood.

    Academic text (1993)

  • To secure the wooden frame, we used several carriage bolts to ensure a strong connection.

  • You should insert a carriage bolt into the pre-drilled hole for added stability in your project.

Synonyms

bolt
vscarriage bolt
  • Specialized
42 3.8

A metal pin with a head that holds two parts together with a nut

is a specific type with a round head and partial threads for timber

Surface Forms

carriage bolt singular
carriage bolts plural

Morphology

carriage + bolt

The noun 'bolt' makes the overall category clear (a type of fastener), and 'carriage' as a modifier will lead a B1 learner to infer it is a specific kind of bolt associated with carriages or a particular use — so the basic idea 'a kind of bolt' is derivable. However, the precise technical features (round head, partially threaded shank, typical use in timber and insertion into pre-drilled holes) are specialized and not predictable from the constituents alone, so the expression is only partially transparent.

Etymology

Carriage bolt comes from its old use on horse-drawn carriages: the bolt had a smooth, rounded head and a small square part under the head that fit into the wood so it would not turn when you tightened the nut. That's why the name now means this kind of bolt often used in wood work.