I had the same issue: brass nut that wouldn't screw on an older J250. Ries made a new 3/8 camera screw for me with the correct bronze knob to match my old tripod, but the screw profile was machined for the current J250. So I sent that one back and a new screw was machined with the right profile. That screw arrived but the brass nut wasn't machined correctly and wouldn't screw on. I knew my J250 was early 90s, so I sent in my original 1/4-20 to Spencer to compare (I know, I know). Now I out two camera screws. I spoke to Spencer twice since Feb, plus lots of emails. He said my original and redone screw had shipped in April. Nothing arrived here and I know when they ship, you normally get a USPS or UPS confirmation email. He also told me the shop had flooded during December, so things were in disarray. Messaged him again today.
CH
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