Need a Countersunk Fastener for Plastic...? Source?

[CPosner]

I am in need of a Hi-Lo or Plastite type screw for a project.
It needs to have a countersunk head with a 90 degree angle in stainless steel probably 18-8 or 316.

I've done my Google searching with little luck. I've contacted some companies with no avail either.

Does anyone have any sources or ideas on where to find one of these?

Thanks!

 

[Pud]

Countersunk fastenings are a no-no for plastics due to the radial stresses produced. These cause creep and joint relaxation (or they crack the boss).

That is why you are having difficulty sourcing them.

A standard self-tapping screw (as used in MDF), would be ok but you will need to trial the core sizing to get the best pull out/stripping combo.

Cheers

Harry

 

[CPosner]

Ah, I am fastening a metal part that has the countersink in it. It is fastening into the plastic.


I have found "Delta PT" screws which are metric plastic fasteners. I am having trouble finding a company that keeps them in stock.

 

[Pud]

Well, here is a start - although UK based I'm afraid!! - at least they are made!!

http://tinyurl.com/6et7ow

(Try the "Challenge Us" for the SS!)

Cheers


Harry