7 bolt arp head studs

[50trimgst]

i have a set of arp head studs and nuts minus one nut, because when i removed the head one of the nuts was a hardware store special. so i just chucked it out the garage cause i figured i could buy just one nut and did not trust a random nut that someone used. i ordered 2 of them off extreme psi and they are both to big... i ordered the 11mm metric nut because that is what there site says the nut is. the nut is just barely to big i mean i can kinda turn it on but it will rock side to side and is visualy bigger than my other arp nuts.. so did i order the right part and they sent me the wrong nuts or did i order the wrong nuts ... again i ordered the 11 mm metric nut they have listed under there 7 bolt head stud kit. and is a grade 8 nut gonna hold up? the car did have a mls steel hg and this random nut with no hg leak.. any input would be appreciated.

 

[My1GLaser]

Does the threaded part look bigger too, or just the flanged bottom part? I've had 2 different 6 bolt ARP head stud sets and the flanged bottom of the nuts were different sizes but they were both the same 12mm thread.

Do you have a 12mm bolt or tap laying around that you can try to screw that nut on?

 

[50trimgst]

Resolved. They sent the wrong nut. They Say arp had the wrong part number idk. But they are sending me the right nuts for free.

 

[dsmotors95]

hey im having the same problem..just wondering if it the 11mm metric nut was the correct one for the 7 bolt head studs?

 

[Cdc1221]

Yes its 11mm.

 

[erkitner]

6 Bolt: 12mm
7 Bolt: 11mm

It's good ARP sent you those for free! Good business practice.

 

[Cdc1221]

6 Bolt: 12mm
7 Bolt: 11mm

It's good ARP sent you those for free! Good business practice.

I think 1st gen 7 bolts have 12mm bolts

 

[AwD4g63TsI]

I think 1st gen 7 bolts have 12mm bolts

1st gen 7 bolts use 11mm

 

[dsmotors95]

thanks..
also just wanted to add that i bought them and there still having the same issue so if anybody id thinking of buying the nuts it would be a good idea to message them and tell them to make sure the vin number matches..