Need help identifying bolt size please

[quexpress]

I wish to replace the screws that fasten the carburator top covers.
See part 25 in this parts fiche:
http://www.hdlparts.com/fiche_section_detail.asp?section=148927&category=MOTORCYCLES&make=HONDA&year=2000&fveh=3479

The description reads: SCREW-WASHER (4X18)

What does the 4X18 stand for?

I wish to replace these with Stainless Steel Metric Socket Head Cap Screws,
as shown in this link:

http://www.fastener-express.com/index.asp?PageAction=VIEWCATS&Category=246

However since I don't know how to interpret the thread size and pitch of the OEM screw, I'm in the dark.

Any insight would sure be appreciated! 

[roboto65]

Pretty sure they are say 4mm x 18mm  long I have some at the house for Magnas we also do the bowls but on the boat right now also have another link I can get when I am not diving at night LOL

[sandy]

Here's the one you need. The .7 is the thread pitch of the screw. The 4mm is the diameter and the 18mm is the length of the bolt below the head.  http://www.fastener-express.com/index.asp?PageAction=VIEWPROD&ProdID=2056 

[roboto65]

http://www.microfasteners.com/catalog/products/METSCMS.cfm

Here is where I get mine for the Magna carbs which are the same carbs!!

 And you get 20 for the price

[quexpress]

Here's the one you need. The .7 is the thread pitch of the screw. The 4mm is the diameter and the 18mm is the length of the bolt below the head.  http://www.fastener-express.com/index.asp?PageAction=VIEWPROD&ProdID=2056 

Thanks!!! 
BTW how did you know the thread pitch? Did you measure it, or was it mentioned somewhere else?

[quexpress]

http://www.microfasteners.com/catalog/products/METSCMS.cfm

Here is where I get mine for the Magna carbs which are the same carbs!!

 And you get 20 for the price

Thanks!!! 

[sandy]

Here's the one you need. The .7 is the thread pitch of the screw. The 4mm is the diameter and the 18mm is the length of the bolt below the head.  http://www.fastener-express.com/index.asp?PageAction=VIEWPROD&ProdID=2056 

Thanks!!! 
BTW how did you know the thread pitch? Did you measure it, or was it mentioned somewhere else?

I knew from previous experience dealing with metric standards.

[quexpress]

Thanks!!! 
BTW how did you know the thread pitch? Did you measure it, or was it mentioned somewhere else?

I knew from previous experience dealing with metric standards.

OK thanks!