Screws?

[samaritan]

Does Stihl use proprietary screw thread?

 

[lone wolf]

Does Stihl use proprietary screw thread?

No, not the threads, just that locking machine work on the head of the screws where they seat. You can us any metric screw, just measure the thread count though, or look it up in the STIHL IPO. On what saw and which screws are you needing?

 

[Mad Professor]

No, not the threads, just that locking machine work on the head of the screws where they seat. You can us any metric screw, just measure the thread count though, or look it up in the STIHL IPO. On what saw and which screws are you needing?

Good source of the Stihl locking screws is junkers that are just going to get scrapped. Clean them up, sort them out, and have a stockpile when you need one.

 

[lone wolf]

Good source of the Stihl locking screws is junkers that are just going to get scrapped. Clean them up, sort them out, and have a stockpile when you need one.

I always take them out if I scrap a saw ,200T's not applicable LOL!

 

[barfer]

The exhaust manifold and cover bolts are metric M5 thread on my 462 FWIW

 

[samaritan]

No, not the threads, just that locking machine work on the head of the screws where they seat. You can us any metric screw, just measure the thread count though, or look it up in the STIHL IPO. On what saw and which screws are you needing?

Its an ms251c the intake manifold screws (4)

 

[lone wolf]

Its an ms251c the intake manifold screws (4)

@ray benson. Ray can we get an IPL to help this guy with a screw size?

 

[ZeroJunk]

Keep in mind how they measure metric pitch. Most Stihl screws are 5 mm .8 , which is pretty standard, but does not have to be.

 

[ZeroJunk]

Does Stihl use proprietary screw thread?

I buy 5mm .8 by 20 mm Allen screws 100 at a time from Automotive Fasteners. The Stihl Torx are better, but these work fine for most applications.

 

[ray benson]

Its an ms251c the intake manifold screws (4)

@ray benson. Ray can we get an IPL to help this guy with a screw size?

 

[ZeroJunk]

It tells you the length, not the pitch. Need both.

 

[lone wolf]

OP it's a Pan Head self Tapping Screw, you better order them. 9075 478 4197

 

[singinwoodwackr]

there are also fine thread...5x.80 and at least 3 different course threads like exhaust bolts on the 190 series and all the plastic saws.

 

[Bob Hedgecutter]

It tells you the length, not the pitch. Need both.

I read 4mm X 12mm on that IPL and being as how they are self tappers- no pitch required.
D4 = 4mm diameter

 

[ZeroJunk]

I read 4mm X 12mm on that IPL and being as how they are self tappers- no pitch required.
D4 = 4mm diameter

Duke's mixture. I was looking at 25 , for no particular reason.
Seems just working on this stuff there are three threads. You have threaded like most muffler screws, and most all vintage saws.
Then, like say on the starter cover of a hedge trimmer there are two different self tapping screws. Two in to metal, and three in to plastic. But, all five self tapping. Just different.
Most muffler screws on hand held blowers are self tapping. On back packs they threaded 5mm .8 .
Back pack blowers screws are self tapping in to plastic, but the ones that hold the starter on are 5 mm .8
The ones that hold the pan on may be either on clam shells.

Method to the madness ? Beats me.

 

[Bob Hedgecutter]

Duke's mixture. I was looking at 25 , for no particular reason.
Seems just working on this stuff there are three threads. You have threaded like most muffler screws, and most all vintage saws.
Then, like say on the starter cover of a hedge trimmer there are two different self tapping screws. Two in to metal, and three in to plastic. But, all five self tapping. Just different.
Most muffler screws on hand held blowers are self tapping. On back packs they threaded 5mm .8 .
Back pack blowers screws are self tapping in to plastic, but the ones that hold the starter on are 5 mm .8
The ones that hold the pan on may be either on clam shells.

Method to the madness ? Beats me.

But, we are only talking about intake manifold screws on a 251C.