"Andrew" wrote in message
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On 22/10/2020 08:27, michael adams wrote:
A bolt is threaded into a nut to tighten it,

A screw is threaded into a female thread, or as in the case of woodscrews
creates it own female thread.

Is a cylinder head bolt, a bolt or a machine screw ?.

Possibly this may help clarify things.

Functionally its a screw, as its screwed into a thread; rather than being
secured with a nut as is a bolt.

The fact that people mistakenly refer to them as "bolts" based solely on
their appearance rather than on their function is unfortunate.

Whereas cylinder head "studs", which are first screwed into the head,
then do then function as "bolts"; as they don't move any further, and are
secured by cylinder head nuts.


michael adams

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