What are these 2 black studs doing?

UK PROFESSIONAL DRIVERS FORUMS THE UK PROFESSIONAL DRIVERS FORUM (INTERACTIVE)
1

Yeah I know what you were thinking :open_mouth: but what are they in aid of ?

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2

Most likley they are the first fitment studs on the production line - once the chassis is built they use the black ones to fix the wheels so the chassis can be rolled - they are probably 10.2 studs rather than 8.8
cheers
Steve

3

Possibly, they’re only on our newer MAN’s though on every wheel.

4

I was going to say they were answering the call to Mark Dixons blue light!!!

but then realised!

5

bald bloke:
Possibly, they’re only on our newer MAN’s though on every wheel.

Are they slightly longer, could be for fitting wheel trims?

6

waynedl:

bald bloke:
Possibly, they’re only on our newer MAN’s though on every wheel.

Are they slightly longer, could be for fitting wheel trims?

Nope same length.

7

bald bloke:

waynedl:

bald bloke:
Possibly, they’re only on our newer MAN’s though on every wheel.

Are they slightly longer, could be for fitting wheel trims?

Nope same length.

That’s me out of ideas then :laughing:

8

Aesthetic?

9

Could just be replacements for old ones, been damaged or loose.

10

gm:
Most likley they are the first fitment studs on the production line - once the chassis is built they use the black ones to fix the wheels so the chassis can be rolled - they are probably 10.2 studs rather than 8.8
cheers
Steve

What does the 10.2 and 8.8 mean here? Diameter?

11

markers for the tyre man :unamused:

12

Dummkopf: They are to show which is top and which is bottom.

13

gonzothejaffa1:
markers for the tyre man :unamused:

And? :unamused:

14

Where are the protection ring / nut covers? they are probably to hold them on

15

44 Tonne Ton:

gm:
Most likley they are the first fitment studs on the production line - once the chassis is built they use the black ones to fix the wheels so the chassis can be rolled - they are probably 10.2 studs rather than 8.8
cheers
Steve

What does the 10.2 and 8.8 mean here? Diameter?

Tensile strength perhaps

16

44 Tonne Ton:

gonzothejaffa1:
markers for the tyre man :unamused:

And? :unamused:

and what thats what we use as a start point when torqueing the nuts up

17

Ahh at last something usefull i larn,t from my tech days many moons ago.
8.8 and 10.9 are the iso measure of tensile strength, truck wheel studs should be stamped this on the end and should be 10.9 or 12.2.usually on the opposite end to the thread.
4.6 is normal mild steel, and the higher the number the greater the shear strength is.
ISO 898-1 standard: 4.6, 4.8, 5.8, 8.8, 9.8, 10.9, and 12.9
Dunno what the black studs are forâ– â– ?
Klunk

18

klunk/â– â– â– â– â– â– â– â– 
Ahh at last something usefull i larn,t from my tech days many moons ago.
8.8 and 10.9 are the iso measure of tensile strength, truck wheel studs should be stamped this on the end and should be 10.9 or 12.2.usually on the opposite end to the thread.
4.6 is normal mild steel, and the higher the number the greater the shear strength is.
ISO 898-1 standard: 4.6, 4.8, 5.8, 8.8, 9.8, 10.9, and 12.9
Dunno what the black studs are forâ– â– ?
Klunk

[zb] that it’s time for a stella. :laughing:

19

They will be the 1st 2 studs used as the hubs/chassis has been painted

20

Balancing ?