What size are the nuts on WG cap

[Oak16v]

Hi guys wanna get sum new nuts for my WG
anyone know the size of them plz

Cheers Billy

[LHD_Kid]

I would replace the whole lot, ie the studs and the nuts and washers...
best way is with some socket head bolts, in stainless, with stainless washers...
available from Namrick... Socket Cap Head Screw (A2 Stainless Steel)
6 No. M5 x 50mm plus washers
Linky
HTH
Chris

[Oak16v]

Thanx for the quick reply m8

Cheers Billy

you

[ericd]

I thought on the cap they were m4 flange nuts , but I maybe wrong

[Jas11n]

I thought on the cap they were m4 flange nuts , but I maybe wrong

Yup Eric, I replaced mine last year (cheers John ), M4 flange nuts indeed.

Jas..

[s2driveruk]

yeah but you can remove the nut and the threaded bars and just use the M5x50 s/s capheads with some washers.......here's mine from when i did it last summer

[LHD_Kid]

yeah but you can remove the nut and the threaded bars and just use the M5x50 s/s capheads with some washers.......here's mine from when i did it last summer

Bingo..... so much better than keeping the rusty bits the nuts were rusted to...

and won't rust in the future either.......

[newsh]

I can get the flange nuts if you want a set.

[Andyh-R6S]

Your nuts

The correct type of nuts are “ Flange Nuts”.

I have just bought loads of ‘M4 and M5’ Stainless Steel (A2) flange nuts, so if your are prepared to split the cost plus postage I will send you some. (8 off, that will allow a few to be lost £2 to UK address)

Either way you will have the correct fasteners. Mine will turn up towards Thursday or Friday this week. (21st March 2008)

Do not use mild steel, nylocs or bent beam fasteners and definitely do not use washers of split washers. The only change you need is to do, is from stainless still from passivated mild steel.

Alternatively, try eBay.

Ba,

A.

[Andyh-R6S]

Steel not Still

Brain dead. Spelling gone to pot.

[Oak16v]

Cheers Andyh-R6S i ordered the M5x50 bolts on saturday gone will see how they go bud, will let u know if i may need them off you

Many thanx for ya help guys

Billy

[LHD_Kid]

Cheers Andyh-R6S i ordered the M5x50 bolts on saturday gone will see how they go bud, will let u know if i may need them off you

Many thanx for ya help guys

Billy

This is a neat way of doing it, and also replaces the rod part with stainless.... just doing the nuts is only half the job.... When I did mine, 2 were so badly rusted on they were not possible to remove jusy the nuts...

[ericd]

update for anybody interested,

Tried m4 flange nuts (7mm head) don't fit, just noticed originals have 8mm head so I guess m5 flange nuts are the correct fitment ?

[Andyh-R6S]

You are correct, the stud are 'M5' in diameter.

I have use stainless steel flange nuts to replace the old nut as my studs were OK.

However, the spare wastegate I bought to have a standard top cover, rather than the wrecked version the previous owner made, I could not get one of the nuts off and the stud came out. Everything is ‘M5’ and the length of the replacement cap bolts are “50 mm”. (Use a standard SS M5 washer between the cap bolt and the wastegate top cover)

[terrybullwon]

Know your nuts

Metric Threads
There are two kinds of ISO metric threads: co**** and fine.

The ISO metric thread profile and proportions are as follows:


Metric Thread Pitch and Tapping Sizes
Size Pitch (mm) Tapping Diameter (mm) Clearance Holes (mm)
Co**** Fine Co**** Fine Close Medium Co****
M1.6 0.35 1.25 1.7 1.8 2.0
M2 0.4 1.6 2.2 2.4 2.6
M2.5 0.45 2.05 2.7 2.9 3.1
M3 0.5 2.5 3.2 3.4 3.6
M4 0.7 3.3 4.3 4.5 4.8
M5 0.8 4.2 5.3 5.5 5.8
M6 1.0 5.0 6.4 6.6 7.0
M8 1.25 1.0 6.8 7.0 8.4 9.0 10.0
M10 1.5 1.25 8.5 8.7 10.5 11.0 12.0
M12 1.75 1.25 10.2 10.8 13 14 15
M16 2.0 1.5 14.0 14.5 17.0 18.0 19.0
M20 2.5 1.5 17.5 18.5 21.0 22.0 24.0
M24 3.0 2.0 21.0 22.0 25.0 26.0 28.0
M30 3.5 2.0 26.5 28.0 31.0 33.0 35.0
M36 4.0 3.0 32.0 33.0 37.0 39.0 42.0