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General control line discussion => Open Forum => Topic started by: Paul Taylor on March 25, 2008, 08:57:01 PM

Title: Head bolt size
Post by: Paul Taylor on March 25, 2008, 08:57:01 PM

Anyone know what size the head bolt is for an OS .25?

Thanks
Paul

Title: Re: Head bolt size
Post by: Garf on March 25, 2008, 10:08:05 PM

S, FP, or LA?

Title: Re: Head bolt size
Post by: Paul Taylor on March 26, 2008, 08:23:16 AM

Opps.

FP

Title: Re: Head bolt size
Post by: john e. holliday on March 26, 2008, 08:34:37 AM

I always go to m y local ACE Hardware store to get metric socket head screws for my OS engines.  I just start thru the bins until I find what I need.  They're getting used to me carrying in engines.  DOC Holliday

Title: Re: Head bolt size
Post by: Bill Gruby on March 26, 2008, 08:52:55 AM

 I could be wrong but I believe it is an M3 Paul. At least it's a place to start. I know the LA is an M3.

  "Billy G"  H^^

Title: Re: Head bolt size
Post by: don Burke on March 26, 2008, 09:01:21 AM

FP has six head bolts, same thread as the cover plate, just longer.  2.5 mm

LA has four head bolts, 3mm

Title: Re: Head bolt size
Post by: don Burke on March 26, 2008, 09:09:14 AM

Tower parts, note these for the FP are the dreaded JIS "quasi-phillips" heads, not allen socket!

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXCV24&P=SM

Title: Re: Head bolt size
Post by: Geoff Goodworth on March 27, 2008, 02:25:47 AM

Tower gives you the screw sizes.  Buy socket head screws from Micro Fasteners.  7mm long is a bit scarce but it's easy to cut down something longer for the backplate.

Cheers, Geoff