Nuts & Bolts... and Screws (basically fasteners)

[RelishingPickles]

When changing out my engine air filters I notices the airbox screws heads were super rusted. I’d like to swap them out for new ones, but not really sure the best way to source them (or any other fasteners).
Is there some master list of all the fasteners used on these vehicles? Do I need to go to a dealership, or just any auto parts place? Is there a website that I could source them all from?
I’m in Canada, so that might add some complications, not sure.
Any advice appreciated. Thanks.

2013 LR4 v8

(Reposted from the general disco forum, but I noticed posts are few and far between)

 

[Rover Range]

The screws are not available from Land Rover, at least in North America.
The something like this.

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

 

[RelishingPickles]

Thanks for the that feedback and that source for the parts. It's similar to what you sent, but the upper part of the "shank" has no threads.

For me it's just that I'm not even sure how I can find out that the part sizes even is to begin with. What does everyone else do when they have a nut or bolt in your and and need to find a replacement. It's not just even the sizes, what are the material that they are made of?
Why do I feel so lost...

 

[ftillier]

For stuff like airbox screws, the material they're made of is likely not that important. For things that are structurally important, there'll usually be a LR part number and you can buy the real deal.

 

[RelishingPickles]

Ok, so I guess if they don't even list the part in the catalogue and drawings, I assume it's not that important.

 

[f1racer328]

I have a pair of calipers that I'll measure bolts/fasteners with to get an exact match.

Material is hit or miss, I generally go for the better material/higher grade.

 

[Rover Range]

Dry wall screws work well too. But, they can rust too.

 

[txfromwi]

Try BoltDepot.com They are my go-to vendor for stuffy stuff like this.
If they don't stock it, it's not available anywhere.

I have dropped and not recovered one as well. As I recall I found a good replacement in my misc box, a long sheet metal screw.

 

[RelishingPickles]

I have a pair of calipers that I'll measure bolts/fasteners with to get an exact match.

Material is hit or miss, I generally go for the better material/higher grade.

It's not just the length and width (as measured with a caliper) The thread spacing as well as pitch can play part.

 

[timc930]

I get all my fasteners (LandRover,BMW,Porsche) from Bel-Metric