Spline vs Torx for Chainsaw Fasteners

Why are chainsaw fasteners referred to as spline? I thought spline meant 12 point and every screw I've ever seen is a 6-point T-27 (or smaller) on the limited Stihls and Huskys I've worked on.

I thought spline fasteners are basically 3 squares laid over each other.

I'm getting annoyed that I have to purchase individual "spline" screws for whatever saw I'm working on and want to buy an assorted set.

Does Stihl offer something like this? There must be some sort of a kit they offer for dealers who perform repairs, no?

 

Just found this. Hm.

BOLTS SCREWS HARDWARE KIT FOR STIHL MS260 MS360 MS440 MS441 MS460 MS461 MS660 | eBay

 

And this one but I can't even see what the screws look like the picture is such crap.

360IN1 Screws Bolts Nuts Clips For Most of STIHL Chainsaws | eBay

 

The t27 torx is 4.96mm-4.99mm point to point. Spline for m5 looks to be smaller at 4.80. I don’t think the two are universal.


https://www.newmantools.com/tech/screwheadprofiles.pdf


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I always thought “splined” in this context meant the locking splines on the inside of the head that prevent them from rattling loose

 

That makes sense now.

Like this picture shows.