Author Topic: 2.5mm x 30mm hex head bolts  (Read 1036 times)

Offline vcutajar

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2.5mm x 30mm hex head bolts
« on: March 10, 2018, 05:25:37 PM »
As the topic subject implies, I need to find 2.5 x 30mm bolts.  They must be hex head.  I have spent the day searching for them but just can't find them.  Ideally stainless steel but any other material will be good.  As a last resort I may even consider near equivalent in imperial.

Help please.

Vince

Offline Firebird

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Re: 2.5mm x 30mm hex head bolts
« Reply #1 on: March 10, 2018, 05:52:42 PM »
Hi Vince

7 BA is a very close size.

Reeves stock them

http://www.ajreeves.com/hexagon-head-boltsscrews.html

Cheers

Rich


Offline Jasonb

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Re: 2.5mm x 30mm hex head bolts
« Reply #2 on: March 10, 2018, 06:24:20 PM »
I think you will have a job finding much over 20mm long and they would be fully threaded hex head screws not bolts.

How many do you need? Sometimes for long bolts I thread the end of a rod and silver solder on a nut that way you can make bolts to whatever length you need without having to turn long slender shanks. Or can you use studs and nuts?

J

Offline vcutajar

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Re: 2.5mm x 30mm hex head bolts
« Reply #3 on: March 10, 2018, 07:26:27 PM »
Rich, I checked those 7BA bolts but they are not long enough.

Jason, I can work with fully threaded hex head screws as long as it is 2.5mm thread.

Can anybody tell me what's the closest equivalent in UNF or UNC?

Vince

Offline fumopuc

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Kind Regards
Achim

Offline Jasonb

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Re: 2.5mm x 30mm hex head bolts
« Reply #5 on: March 10, 2018, 08:06:04 PM »
3-48 UNC would be the closest at 2.51mm but #3 is not a preferred size so choice will be limited. Next down is 2-56UNC at 2.18mm.

EKP do 7BA at 1" long which is a bit better than Reeves but still leaves you short.


Longest M2.5 I have are 20mm from GHW.

Offline Jasonb

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Re: 2.5mm x 30mm hex head bolts
« Reply #6 on: March 10, 2018, 08:11:48 PM »
7BA  x 30 and they are bolts

http://www.ba-bolts.co.uk/smallhex.html

Offline vcutajar

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Re: 2.5mm x 30mm hex head bolts
« Reply #7 on: March 10, 2018, 08:52:07 PM »
Those 7BA x 30 look ideal.  Unfortunately they are one size smaller head and I need a regular size head.  Looks like I have to make them myself.

Vince

Offline Ian S C

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Re: 2.5mm x 30mm hex head bolts
« Reply #8 on: March 11, 2018, 11:05:54 AM »
You could do worse than JasonBs' idea but loctite the nut on with a retaining grade of Loctite, this can be made to look like the head of a bolt, or with a thread showing through, a stud.
Ian S C

Offline Jasonb

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Re: 2.5mm x 30mm hex head bolts
« Reply #9 on: March 11, 2018, 12:02:00 PM »
I find that if a skim cut is taken after soldering the threaded nut on that the joint shows up far less than if you use loctite.

Offline Jo

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Re: 2.5mm x 30mm hex head bolts
« Reply #10 on: March 11, 2018, 01:42:20 PM »
I find it very enjoyable making my own fasteners  :) They come in every size you need with the correct head size, chamfered if desired and thread free length :ThumbsUp: And they don't go rusty sitting in the drawer for a couple of decades waiting to be used  ::).

Jo

(Cap head screws are another matter  :-\ )
Usus est optimum magister

Offline vcutajar

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Re: 2.5mm x 30mm hex head bolts
« Reply #11 on: March 12, 2018, 12:39:09 PM »
Something tells me that I will not be enjoying making 120 of them.

Vince

Offline Jo

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Re: 2.5mm x 30mm hex head bolts
« Reply #12 on: March 12, 2018, 02:17:04 PM »
Something tells me that I will not be enjoying making 120 of them.

I know the feeling  ::) having to make large batches was why I used to use engineering stud and nut humour to break up the monotony before a bunch of old prudes complained about it  :disappointed:

Jo
Usus est optimum magister

Offline Allen Smithee

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Re: 2.5mm x 30mm hex head bolts
« Reply #13 on: March 12, 2018, 08:42:01 PM »
You must be nuts to think that, Jo. Everyone around here knows that your passion for well-formed studs is nothing more than an innocent admiration of skillfully used tools in the pursuit of the perfectly executed screw.

AS
Quidquid latine dictum sit altum sonatur

Offline zeeprogrammer

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Re: 2.5mm x 30mm hex head bolts
« Reply #14 on: March 12, 2018, 08:43:35 PM »
 :lolb:
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
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