I've got a couple of fuseholders that screw into the back of ATC powered speakers that have acted up, that is, they won't screw in all the way. It's not about fuses blowing, but probably because the aftermarket (audio oriented) fuses I was screwing in were a fraction of an mm too long, and the ATC fuse holding tolerance is not great (these aftermarket fuses go easily into everything else in my system). Now, no fuses will screw in. I've attached a couple of photos. The holder is slotted screwdriver cartridge type, 5x20mm, slow-blow,, presumably 10A (fuse is 5A). I'm not sure exactly how it screws in internally - the holder has no threads - but there is a metal sleeve inside the speaker fuse channel with a slot where the holder flange presumably grabs. Anyone recognize the part or manufacturer? I am in contact with ATC for replacements, but would like to find out where these holders come from, so maybe I won't be dependent on them and their U.S. distributor if it happens again. I didn't find the holder on the U.S. element14 site (Newark), but thought maybe because ATC is a British company, someone might have seen it before (of course it could be sourced from anywhere). Thanks,