Small Fasteners

[RB211]

It just seems to make much more sense to keep around M2 and M3 hardware instead of similar imperial sizes. Most products you buy use metric these days. I won't design anything anymore that uses 2-56, 3-48 and 4-40, beyond to use up current stock... With the R/C hobbies of mine, need to stock M2 and M3 anyhow. In Clough42's latest video, he said just as much...

[Noitoen]

Small standard metric fasteners can be found in M1, M1.2, M1.4, M1.6, M1.7, M2, M2.3, M2.5, M2.6, M3, M3.5 and then the rest

[Jim Caudill]

I have a stock of small metric screws for my amateur radio hobby and for servicing various appliances (including DRO's). I got the standard 2,3,4, & 5, but then came across some 2.5mm; so I ordered a 100 of them also.

[mikey553]

Small standard metric fasteners can be found in M1, M1.2, M1.4, M1.6, M1.7, M2, M2.3, M2.5, M2.6, M3, M3.5 and then the rest

I have never heard about M2.6 fasteners. Have you ever seen them? What is the application?

[RSG]

I'm still an imperial guy but look towards metric machine screw when I need to fit a specific size, despite it being metric I still work with it as though it's not.....if that makes sense!

[Glug]

You gotta love the stores that charge more 'because these are metric!'

The grooves are special.

They are imported from a tiny shop, in a remote village of the UK, individually wrapped.

[J Tiers]

if you decided to only stock metric, what do you do when you need an inch size to fix something?

Just throw the non-metric device in the bin? Re-tap to the next larger metric size?

[Doozer]

The obsessive comulsive disorder people like 10 based stuff.
So do the lazy people. So do the people who believe the notion
that, if it looks right (square and straight and even) than it must
be right. The people who put stuff into a neat little category so
they can check the box and say, this is proper, now I don't have
to evaluate it ever again. The follower who like to justify with pride
that, everyone is doing it this way, proves the justification that it
is right. These same people don't know that 100 cubuc centimeters
equals 1 deciliter, and never even heard of a deciliter.
People who dismiss the number series of American threads don't
even know the history of who, how, and why they were invented.
And if you are so trendy that you insist to differentiate between
metric and system international, you need to go and find more friends.
There preference of metric is due to their ill emotional health.
They tend to supress epiphanies of personal enlightnement.
So you get what we have here before us today.

-Doozer

[Noitoen]

I have never heard about M2.6 fasteners. Have you ever seen them? What is the application?

2.6 is "more standard" than 2.5 This crimping pliers has a 2.6 and 3.5 cutting section

[RB211]

Well, design engineers seem to like whole numbers, M2 and M3 covers 95%. I have a bag of M2.5, don't know why I have them?

[Cuttings]

I machine a lot of parts for a fellow the builds high end R/C boats. What I try to do is if the item I am making a part for is metric then I use metric fasteners for anything related to it. If it is imperial measure then I use imperial fasteners. I am trying to be good to the fellow that might come along later and have to work on it.

[mikey553]

2.6 is "more standard" than 2.5 This crimping pliers has a 2.6 and 3.5 cutting section

I have some M2.5 and M3.5 screws, but not M2.6. Machinery's Handbook and ASME B13.1M-2005 standard do not list M2.6 thread. Knipex pliers are a good brand, but not a golden standard. Do you have any better example?

[Dragons_fire]

I have some M2.5 and M3.5 screws, but not M2.6. Machinery's Handbook and ASME B13.1M-2005 standard do not list M2.6 thread. Knipex pliers are a good brand, but not a golden standard. Do you have any better example?

Why they did it, i don't know. Apparently M2.6 was a Japanese standard before M2.5 came along for the rest of the world. Most Japanese electronics i have seen include at least one M2.6 somewhere in them, and certain brands (eg. Kyosho) of Radio Controlled vehicles use M2.6 as well.

[Noitoen]

I have some M2.5 and M3.5 screws, but not M2.6. Machinery's Handbook and ASME B13.1M-2005 standard do not list M2.6 thread. Knipex pliers are a good brand, but not a golden standard. Do you have any better example?

We can get them here at our local shop and apparently also at,

https://www.mcmaster.com/screws/thread-size~m2-6/

[RB211]

We can get them here at our local shop and apparently also at,

https://www.mcmaster.com/screws/thread-size~m2-6/

If McMaster doesn't have it, you know it's a "you" problem.