A SIMPLE POINT !

[Nick Clarke 3Participant @nickclarke3]

Posted by Nicholas Wheeler 1 on 27/08/2021 18:40:30:

Lets not forget everybody using '10mm bolts' because they need a 10mm spanner to turn the actual M6 fastener…..

In engineering a 9/16" bolt, machine screw, set screw or whatever would have a thread 9/16" in diameter whilst in the automotive trade a 9/16" nut would be that across flats – and BS or Whit wasn't!

[JasonBModerator @jasonb]

I thought a bolt with "a simple point" was a nail

[Martin WhittleParticipant @martinwhittle67411]

Posted by JasonB on 27/08/2021 19:04:48:

I thought a bolt with "a simple point" was a nail

That makes sense. And a woodscrew can conventionally be fitted with a 'Birmingham Screwdriver'

https://www.standingwellback.com/birmingham-screwdriver/

Martin

Edited for spelling!

Edited By Martin Whittle on 27/08/2021 19:52:35

[JohnFParticipant @johnf59703]

I concur 100 % with Howard Lewis above — must have gone to the same school !

John

[Clive Brown 1Participant @clivebrown1]

And in 50 years , (on and off), of model engineering, I can't really recall one instance of it making much difference.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Martin Whittle on 27/08/2021 19:50:25:

Posted by JasonB on 27/08/2021 19:04:48:

I thought a bolt with "a simple point" was a nail

That makes sense. And a woodscrew can conventionally be fitted with a 'Birmingham Screwdriver'

[…]

.

When [in Birmingham, many years ago] I sat my O level Woodwork exam, one of the questions was:

A hammer is for knocking-in screws, and a screwdriver for removing them : Discuss

MichaelG.

[duncan webster 1Participant @duncanwebster1]

I've seen carpenters drill pilot hole then hammer the screw half way in, finally screwing in with a screwdriver. This before these modern parallel (wood) screws and electric screwdrivers, which have totally changed things.

[Bill PudneyParticipant @billpudney37759]

I too agree with Howard Lewis, that school must have been crowded!!

cheers

Bill

p.s. I once got into a moderately warm discussion with a technical author, about the difference between a screw and a bolt. She took the issue to the CEO who decreed that "Bolts get shot from cross bows, end of argument", I wandered back to my drawing board (yes it was that long ago), muttering something like "perpetuating a falsehood"

[Anonymous]

Posted by Howard Lewis on 27/08/2021 17:58:05:

Capscrew – Tightened with an Allen key..

 

I would know that as a "Socket-Head Capscrew" (SHCS)

I don't really use the term "Capscrew" but understand it to mean a hex bolt with a section of plain body under the head.

(Apparently so does Britannica)

I don't remember discussing such things at my school. We were more interested in girls, I think

Edited By Peter Greene on 28/08/2021 01:44:52

[J HancockParticipant @jhancock95746]

Yes , happy memories , I was taught that screws were for hammering in ( The Birmingham Screwdriver ) and screwing out.

[WatfordParticipant @watford]

Nobody has yet brought "Metal-threads" into the discussion. A term used in (at least some of) the vehicle bodybuilding industry implying a fully threaded screw probably with a countersunk head.

Mike

[Neil WyattModerator @neilwyatt]

A bolt is a screw with a plain fitted shank, typically for taking a load in shear.

Neil

[Anthony KendallParticipant @anthonykendall53479]

Posted by noel shelley on 27/08/2021 10:22:16:

If a bolt has thread all the way to the head and is longer than about 1" or 25mm then it is NOT a bolt – it's a set screw ! If there is plain rod between the head and the thread it's a bolt. This simple point may save some one trouble when ordering set screws or bolts. Good luck, Noel.

IF the pimply faced youth in the stores who can just about speak English is applying the same rules – and that's a big IF

[Mick B1Participant @mickb1]

Posted by Peter Greene on 28/08/2021 01:39:36:

Posted by Howard Lewis on 27/08/2021 17:58:05:

Capscrew – Tightened with an Allen key..

I would know that as a "Socket-Head Capscrew" (SHCS)

I don't really use the term "Capscrew" but understand it to mean a hex bolt with a section of plain body under the head.

(Apparently so does Britannica)

I don't remember discussing such things at my school. We were more interested in girls, I think

Edited By Peter Greene on 28/08/2021 01:44:52

That's how they were officially referred to in the tool drawing office where I worked around 1980.

But in casual conversation with toolroom machinists – even ones generally respected as "good" – they were very often "cap'ead screws", and it didn't matter whether they were threaded right up the shank or not, they could never be "bolts".

[MeunierParticipant @meunier]

Also very popular in France are 'tirefonds' which by my translation is 'pull the underneath'

a hex-headed woodscrew/bolt with coarse thread, definitely requires a substantial pilot hole and counter-bore for the plain shank.

DaveD

Edited By Meunier on 28/08/2021 15:10:08

Edited By Meunier on 28/08/2021 15:12:22

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Meunier on 28/08/2021 15:07:50:

Also very popular in France are 'tirefonds' which by my translation is 'pull the underneath'

.

Interesting to note that the best offer from DeepL is ‘lag bolts’

MichaelG.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Mick B1 on 28/08/2021 14:26:59:

 

But in casual conversation with toolroom machinists – even ones generally respected as "good" – they were very often "cap'ead screws", and it didn't matter whether they were threaded right up the shank or not, they could never be "bolts".

 

.

Spot-on, Mick

MichaelG.

.

If in doubt, I would always be advised by Unbrako :

https://www.unbrako.com/socket-screws

Edited By Michael Gilligan on 28/08/2021 15:58:54

[Speedy Builder5Participant @speedybuilder5]

I am sure you all have seen these "special" bolds

[peter smith 5Participant @petersmith5]

I saw a variant of this appertaining to screwdrivers. I always liked the one with 3 flat blades for securing all 3 screws in a door hinge at the same time and getting the slots all lined up.

I made up some to amuse test and baffle all and sundry and even took orders for Christmas presents.

Alas, all were lost when some low life set fire to my school workshops many years ago.

[peter smith 5Participant @petersmith5]

Av we finished wiv this Fred???

everyone’s going nuts abouwt it.

wot about left handed Fred’s??

The real thing is

”don’t screw me wivout a washer”?.?

[peter smith 5Participant @petersmith5]

Av we finished wiv this Fred???

everyone’s going nuts abouwt it.

wot about left handed Fred’s??

The real thing is

”don’t screw me wivout a washer”?.?

[Author]

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