Cheap tweak from Virtual Dynamics:

Mcmaster is a great resource.

Are your screws hex, slotted or philips heads? The screws that hold the Silverline's driver assemblies together (as opposed to the screws that secure the entire driver to the baffle), have flat sided, cylindrical, hex driver heads.

If yours are the same size as mine (I don't know my size...maybe send me one of yours as a sample?), I might buy some.

Grant,
It depends if your screws are US or metric. You'll need to take one of each type of screw you intend to replace to a hardware store or Home Depot,Lowe's and measure for thread type, length, pitch,etc. so that you exchange out for the same in brass. I actually had to buy two types, one wood for the external tweeters and woofers and metric machine type for the tweeter internal screws. I can send you some of mine, but if they're not the same size, you could strip out or damage your speakers. You could always contact the Silverline tech and ask them what the screw measurements are for your speakers. That would save you the time of taking them out and to a store to measure them. If the size is the same as mine, I'll send you some. We'll e-mail privately at that point. I had a very positive transaction with McMaster-Carr( my first). I got the screws from two different warehouses within 3 days from ordering. If you look at the McMaster site, you'll see that they have a variety of heads to choose from. My external driver screws are panheads( factory screws are allen type, but I chose philips. Slot head might also be available. My internal tweeter screw heads are flat heads, philips, that are for presunk machine thread holes so that the heads are flat with the tweeter plates.

Mine are metric.

I did drive to a local fastener supply house a few weeks ago...one of the largest in LA...and they sent me away in a hurry. They didn't carry metric machine screws in brass.

Frankly, I have little interest in doing the research to determine their size.

How are those Sistrum platforms working out for your speakers?

They arrived damaged, so I was unable to try them.