Kayfun Replacement O-rings and Screws!

So I know I originally intended to only blog about random builds that I've figuring out, but it just dawned on me that there are SO many important information out there in ECF, except that they are buried in MASSIVE threads. so I figured I'm gonna start compiling and categorizing these information; mostly just because it'll be useful for my own reference, and well, it would turn out to be useful for some folks.

First thing! If anyone is looking for:
1) a source of replacement o-rings
2) replacement deck screws with flat bottoms (many clones have crappy post screws that are rounded at the bottom, making it real hard to capture your leads)

and like me, refuse to pay the ridiculous mark up for normally dirt-cheap and accessible parts, you're in luck.


O RINGS:

(Btw, the information in this post is courtesy of the very kind ECF-er, Akdare)


What:
1) Fill screw oring (the super tiny ones): 2mm inner diameter x 1mm wide
2) Chimney (sits in the top cap, where the top chimney section slides through): 5mm inner diameter x 1.5 mm wide
3) Base and other sections: 18mm inner diameter x 1mm wide

Where:
1) Fill Screw oring: http://www.mcmaster.com/#9262k101/
2) Chimney oring: http://www.mcmaster.com/#9262k121/
3) Base and other sections orings: http://www.mcmaster.com/#9262k616/

SCREWS:

1) What: Those tiny screws for capturing the leads on the deck. Critical dimension: M1.6x0.35mm

Where:
1) http://www.ebay.com/itm/Machine-Scr...768?pt=LH_DefaultDomain_0&hash=item4d1ed99528. (If this is no longer listed, look for the seller Zoro Tools, and find the Cheese A2 SS 3mm Slotted screws. I've found the 3mm to be absolutely perfect)

2) http://www.fastener-express.com/m1.6-x-35-x-3mm-pan-phil-machine-screws-stainless-qty-50-1.aspx (this is a philips head instead of slotted)

There are definitely other sources, but these are the 2 places I've personally bought from and tested them. The main thing about these screws is the fact that the bottom of the screw head is flat, allowing for super easy captures.

2) What: Fill hole screws! (information courtesy of Paul.K)
a. kayfun Lite: M2.5 Countersunk, length = 4mm
b. KFL+ : M2.5 Pan head, length = 4mm
b2. From MaxUT: For the KFL+, apparently the M2.5 x 0.45 x 5 screw also works (Havent verified this myself)

Where: No clue for a. and b. I personally haven't bought these replacements before so i can't help. If you know of a source, please let me know!

For b2, it can be found here: http://www.mcmaster.com/#92000a103/


and oh lastly as a side rant,

to all you sneaky greedy vendors charging $8 to $15 for a tiny pack of o-rings, shame on you guys and well, *** you. :facepalm:

Comments

Thank you for this post, and directing me to it. I just got the fill screw O-rings from McMaster-Carr and they work perfectly :)
 
David1975;bt11749 said:
Thank you for this post, and directing me to it. I just got the fill screw O-rings from McMaster-Carr and they work perfectly :)

welp! glad it helped! I know I hate to pay the ridiculous prices that the vendors charge for a couple of pieces of rubber.
 
For the Kayfun LIte fill screw, what does the counter sunk exactly mean?
 
@ Kiwi,
re, If you know of a source, please let me know!

Recently found a good supplier on Alibaba Express that sells nylon screws to replace the hard to find fill hole screws on your Kayfuns.
These nylon screws work great, better than the factory screws IMO and they seal perfectly without an oring. I did a test order of 48 recently. They arrived in 3 weeks to Canada.
2 of my KFs were out of service due to stripped fill hole screws. Now they are all back in service with this improvement.
Here are the links for the 2 common fill hole screw sizes of M2.5 x 5 and M3 x 5 (well the ones listed on Ali are actually M3 x 6, but they work fine).

Low price 1 piece Metric Thread M2.5*5mm Nylon Countersunk Head Phillips Screws-in Screws from Home Improvement on ...........com | Alibaba Group
Low price 1 piece Metric Thread M3*6mm Nylon Countersunk Head Phillips Screws-in Screws from Home Improvement on ...........com | Alibaba Group

You can order 24 of each for $4.12 USD total. So affordable for the average vaper. He combines shipping costs if you order more than 1 type.
Vape vendors take note! These should be in every vape shop on the planet.

Careful with the brass ones he has listed tho. The brass M2.5 x 5 works (with an oring), but the brass M3 x 5 does not fit. The head is to wide.
One thing tho. The tracking never showed up on Track17 until the day it was delivered. Not sure if this was an isolated incident or what, but rest assured they will come.

GL
Vape on...
 
Sorry. :censored: Looks like they put the kibosh on my links..
Oh well, the screws are out there. A search will find them..
M2.5*6mm Nylon Countersunk
M3*6mm Nylon Countersunk
GL
 
Oh how I wish I had seen this blog earlier. Thank you Kiwi for this information! It is such a shame we have to go digging for info that should be easily accessible. This is exactly the kind of info that makes life much easier, for vapors. Thank you so much!!!
 
Fill screws recommended by MaxUT: For the KFL+, the M2.5 x 0.45 x 5 screw also works (I can verify these work).
 
Now if someone could tell me where to buy the tiny air adjustment screw, I would be thrilled. I can't buy one without buying a whole parts kit for the Kayfun.
 
Very helpful post, thank you. I ordered 100/ea of the fill screws and O-rings (below) referenced in the OP, and they're a perfect fit for my EHPRO KFL+V2 clones.

http://www.mcmaster.com/#9262k101/
http://www.mcmaster.com/#92000a103/

McMaster doesn't seem to quote shipping when ordering so I didn't really know what to expect there, but my order was only charged $6.42 shipping, so for a whopping total of $14.20, I got enough screws and O-rings to last a lifetime!
 
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I can't believe that no one has figured out where to buy air adjustment grub screws for the authentic Kayfun Lite +. The screws Fasttech sell are the wrong size. They must be for clones and not authentic tanks. These screws are almost impossible to find.
 
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Anyone know the screw thread size for the KFL+ V2 aire screw on the bottom? It's smaller than the fill screw but larger than the post screws... most likely size is M2x3mm. Can anyone confirm?
 
From the posts above it seems like different KFL's sometimes have different size screws. Mine are EhPro KFL+V2's. You said your air hole screws were smaller than the fill screw but mine are larger.

There's only one M size between 1.6 and 2.5, that's M2. Unless yours uses non-metric screws.

I picked up some assorted screws from Ace and M3 screws fitted in my air holes. Haven't bought any yet but I took a quick look on McMaster and they have 3 mm M3 SS grub screws. I think they were hex socket heads rather than regular straight screwdriver heads like the originals. I think M3 was the smallest size grub screw they showed so you would have to look elsewhere if you needed M2.

McM do 2 types, one with a pointed end and one with a cup shaped end. The ones in the KFL have flat ends. Read a post once giving a source for flat ended grub screws but I can't find it any more.
 
I can't believe that no one has figured out where to buy air adjustment grub screws for the authentic Kayfun Lite +. The screws Fasttech sell are the wrong size. They must be for clones and not authentic tanks. These screws are almost impossible to find.

I find screws for my RTAs all the time. It's super mega easy. All you need is a digital vernier caliper that measures in metric. If you're tanks are made in a country that is on the metric system, it's unlikely that they are using screws that aren't metric.

So you take your grub screw and you measure the width of the threaded part. That will give you your "M" value. So on vape tanks, you will likely find M1.6, M2, M2.5 and M3 widths. Now, screw widths usually meanure a littl elower than their M value, so if your screw width measures 1.85mm, then that's 2mm...so you have an M2 screw.

Now in your case, since it's a grub screw, you simply measure the height and you have the height measurement. So lets say it's 4mm in height.

Now you know you have an M2x4mm screw.

There is another value you'll see in screw sizes. Like:

M1.6 x .35 x 3mm
M2 x .40 x 5mm
M2.5 x .45 x 8mm
M3 x .5 x 4mm

That middle number is the thread pitch. You don't need to concern yourself with that because all mainstream, mass produced machine screws of a certain "M" value will all have the same thread pitch. No vape gear is going to use some special thread pitch on a screw, not even high end gear, because that would increase the cost of the product for no good reason and that means a higher retail price.


Nw if you are measuring a screw that has a head like a panhead screw, to get the height you only measure the threaded part. The easy way to do tha tis to measure the height of the total screw with the head, then you measure the height of only the head and you subtract that from the total height and you have your screw height size.

Sets you have a panhead screw on your RTA and you need to buy spares. You measure the width of the threaded apart and you get 2.42mm. That's 2.5mm. So that's an M2.5 screw.

Next you measure the total height with the head and you get 6mm. Then you measure the height of only the head and you get 1mm. 6-1=5 so that's a 5mm long screw.

So you have a screw that's M2.5 x 5mm. You will be looking for a stainless steel pandead screw thats
2.5M x .45 x 5mm.

Easy peasy.
 

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