"These Surface Screw Cups are made from 10ga Solid Brass and they just kinda sit on the surface with their cups mating nicely to any corresponding screw. They came in a cardboard box but I didn't have time to count them all - I'm pretty sure there was about 100 .............."
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Review 7 for Screw Cups 8ga Carbon Steel Pack of 200
"Purchased for a wet environment and I thought that the np would offer some protection but in most instances the cups started rusting immediately. Might just as well have been plain steel. Screwfix you should be offering a Stainless Steel option - I have had to go elsewhere for a screw fixings product to replace these - which is risky as Stainless steel screws tend to be a little brittle and swopping the cups may cause some of your stainless screw to fail. Overall very disappointing."