m20 arp studs

[jaywood]

Wait, so no more mcmaster studs?

[TS87325IS]

Metric blues are definatley not reusable just incase anybody wants to know. Im going arp.

[jaywood]

Metric blues have a Class 4g6g thread fit, a minimum Rockwell hardness of C38, and minimum tensile strength of 176,900 psi.

[germanrob82]

Closest thing is Black-Oxide M10x1.5 150mm Length Spacer Stud. McMaster-Carr Part # 93275A046 = $2.79/ea

http://www.mcmaster.com/#catalog/118/3177/=h5f0uj

EDIT: Hmmm.. looks like ARP head studs are also Black-Oxide steel.. if these work then lots of people have been getting butt raped @ $225 a pop.

OKAY HERE'S WHAT I FOUND OUT....

The McMaster Carr's have a tensile strength of 125,000psi and rockwell hardness of c27

The ARP2000's have a tensile stregth of 220,000psi and rockwell hardness of c46

I haven't double checked yet but I'm almost certain I remember the metric blues being around the same figures as the McMaster Carr's.... and they cost half as much

[TS87325IS]

Nahh.... im going to give them the good old 18to20 lbs of boost test though..lol

[Cyrix2k]

anyone have access to an engineering lab that can run tests on the ARP & MCMaster studs? mostly when plastic deformation occurs.

[TS87325IS]

I will...

[jaywood]

Report back once you've tested them and what not. That is a pretty good deal

[TS87325IS]

They do alright. Im going to try those studs

[jaywood]

Those studs from mcmaster look quite interesting.

I currently have metric blues and they have been holding up nicely for me for the past 8 or so months. Boosted m20 on ~8lbs, :giggle:

[TS87325IS]

Probably would not need to cut down the studs, not sure but its not that much longer.

[RobertK]

Do you know the pitch and the bolt size for the arp or blue metric? Also, 175mm would be safer then 150mm?

M10x1.5mm 150mm Length... That's how I found the stud kit on McMaster Carr but in this case the 175mm stud would give you 25mm extra length for the nut to thread on.

washers?

You use the same hardened washers you would use with stock or metric blue bolts.

[Exodus_2pt0]

I was just thinking that too.. better to get the slightly longer ones and cut to size. Part # 93275A047

washers?

[amazo]

Do you know the pitch and the bolt size for the arp or blue metric? Also, 175mm would be safer then 150mm?

[RobertK]

Yep thats the nuts, also you would go with the 175 mm long studs i belive 150 is too short, there would be none sticking past the head.

I was just thinking that too.. better to get the slightly longer ones and cut to size. Part # 93275A047