Interpreting hex nut description

[Bill PhinnParticipant @billphinn90025]

I've just bought two kinds of 1/2" BSW hex nuts from Zoro:

https://www.zoro.co.uk/shop/fasteners/hexagon-nuts/1-2-bsw-hex-machine-screw-nut-freecut/p/ZT1095040X

https://www.zoro.co.uk/shop/fasteners/hexagon-nuts/1-2-bsw-steel-hex-full-nut-bzp/p/ZT1094836X

Can anyone tell me what the term "freecut" means in the case of the first kind?

Thanks!

[Bill PhinnParticipant @billphinn90025]

[Anonymous]

Probably nothing of any engineering significance.

Andrew

[old martParticipant @oldmart]

I can only think that somebody has assigned that code to a particular type of nut and that "freecut" has no particular meaning. Look at the long strings of code at the top of each page when you are online, it is only an index.

[pgk pgkParticipant @pgkpgk17461]

Best guess that it means "as they come" as opposed to bzp or passivated …

pgk

[JasonBModerator @jasonb]

One is grade 6, the other grade 8. one is BZP the other uncoated

[Bill PhinnParticipant @billphinn90025]

Thank you for the replies.

I notice that the nuts described as freecut are assigned to both grade P and grade 6 simultaneously. Presumably these are alternative descriptions for what is essentially the same grade of steel.

I've just found the following (http://www.fasnetdirect.com/refguide/Metnutst1cl810.pdf), which may explain the use of the term freecut in this case:

"Class 6 nuts shall be made of a steel which conforms to the following chemical composition– Carbon: 0.50% maximum; Phosphorus: 0.060% maximum; Sulfur: 0.150% maximum.

Class 6 nuts may also be made from free-cutting steel which conforms to the following chemical composition–Carbon: 0.50% maximum; Sulfur: 0.34% minimum; Phosphorus: 0.11% minimum; Lead: 0.35"

[Bill PhinnParticipant @billphinn90025]

Posted by JasonB on 04/06/2021 18:53:39:

One is grade 6, the other grade 8. one is BZP the other uncoated

Thanks Jason. I knew that already. One other difference is the freecut nuts have a bigger af measurement than the grade 8 bzp ones.

Edited By Bill Phinn on 04/06/2021 19:01:22

[SillyOldDufferModerator @sillyoldduffer]

'Qualcast' make lawnmowers and hedge-trimmers. Maybe 'Freecut' refers to that. Buy only genuine Qualcast nuts and bolts! Available at all good ironmongers…

PS.

Tempting to use my Moderator superpowers to delete my own foolishness.   Qualfast is not the same as Qualcast.  Second time today I've misread something and put my foot in it!

 

Edited By SillyOldDuffer on 04/06/2021 19:19:13

[old martParticipant @oldmart]

Posted by SillyOldDuffer on 04/06/2021 19:06:30:

'Qualcast' make lawnmowers and hedge-trimmers. Maybe 'Freecut' refers to that. Buy only genuine Qualcast nuts and bolts! Available at all good ironmongers…

PS.

Tempting to use my Moderator superpowers to delete my own foolishness. Qualfast is not the same as Qualcast. Second time today I've misread something and put my foot in it!

If you were the worrying kind, you wouldnt have chosen that monika

Edited By SillyOldDuffer on 04/06/2021 19:19:13

[Michael GilliganParticipant @michaelgilligan61133]

https://www.ebay.co.uk/itm/283413042917

**LINK**

If I can get a look at BS1083 … I will let you know if it has anything that looks relevant

MichaelG.

.

So far as I can see … the word ‘freecut’ does not appear in the Standard …

and incidentally, ‘Grade A’ is the lowest specification.

Edited By Michael Gilligan on 04/06/2021 19:49:43

[Bill PhinnParticipant @billphinn90025]

I assumed you were just joshing, Dave, so no harm's been done.

Actually harm has been done, because I now can't excusably wheel out the groan-inducing anecdote about my father's knackered old Qualcast lawnmower that had one particular nut that always kept falling off it; someone had put a hex on it, you see.

 

ETA: Thank you, Michael.

Edited By Bill Phinn on 04/06/2021 19:34:04

[jimmy bParticipant @jimmyb]

Michael

BS1083

Jim

[Michael GilliganParticipant @michaelgilligan61133]

Posted by jimmy b on 04/06/2021 19:38:46:

Michael

BS1083

 

Jim

.

Tut Tut … I’m surprised they are getting away with publishing that

https://shop.bsigroup.com/ProductDetail?pid=000000000000066806

MichaelG.

Edited By Michael Gilligan on 04/06/2021 19:55:45

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