Bbc head studs can’t find the 6point hex only 12 pt?

[buddy350]

Arp has the 6 point hex style nutts but they are way way more expensive.

about ten years ago it seemed that all that was on the market was 6point hex but now amazon and eBay are flooded with the 12 point nutts for the head studs.

why does this website always default to lower case when starting a new paragraph?

Anyhow for me personally the 12 point looks to have less meat on the walls of the nut.
The 12 point clearly looks thin as heck but they seem to have a wide base.

Any engineers in here?

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[AuroraGirl]

Id think if a nut is designed like that, it would actually be better for not stripping. Because surface area is increased AND its structurally reinforced and your applied torque turns more like a lever than just kinda pushing it. But a hexagon with a 12 point socket is what you are thinking of. I think.

 

[QBuff02]

I'm not an engineer but I would think if there was a problem with the integrity of a 12 point nut that companies like ARP, etc wouldn't use them. The aftermarket has also been going this route for years. Even a lot of the new head bolt kits come with a reduced size head. Most 12 point hardware does appear to have a larger base to them, but I think that's mostly because of the difference in style.

 

[Wumbo]

There's a reason that 99.9% of fasteners on jet engines are 12 point.

 

[buddy350]

Damn good point.
WOW

Interesting

There's a reason that 99.9% of fasteners on jet engines are 12 point.

 

[varmit86]

I build some big block engines and am pretty sure I have a new set of studs they have 6 point nuts I will sell you if you want you can send me PM.

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[Blue Ox]

Which axle is stronger, the one with more splines or less?

 

[bucket]

Which axle is stronger, the one with more splines or less?

I don't know what you're gettin at fella. Everybody knows that the 10 spline coupler sleeve between a 465 and 205 never wears out.



P.S. I figured that one would be a good strength example.

 

[varmit86]

I think the point he was originally stating whs more along the lines of holding force. An axle is twisting and it in both examples comes down to surface area.
In this particular question would be more like if you use a washer under a nut it spreads the area being held down over a larger area.
In the axle exapmle the more splines equals more area when twisting and unless you have a nut rounding off from being tightened not really a point here.
I do see his point as the 6 point nuts are a little larger.
In my opinion a good question.

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[Blue Ox]

I got the impression he was talking about the wall thickness of the nut. I was just trying to point out that more splines on a shaft means the splines are smaller, yet despite less material the higher spline count is, in fact, stronger. Also, I doubt ARP is selling nuts that are prone to splitting.

 

[varmit86]

Anyway if you are wanting a 6 point set new still in the box I have a set for a std BBC head I will let go for $100 cheap

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