Maybe I have the same problem as the 8656: the cover screws for the 8643 is NOT 6-32 (USA, national coarse), nor is it 6-40 (USA, national fine). The diameter is very close to USA #6, a finer thread than 32 threads per inch. It has to be some metric size that the local specialty guy did not recognize.

Thank you Goran for the idea of looking at the parts list. I will try to find an 8643 manual on line somewhere and see what it says.

Bill


On 3/17/2025 5:17 AM, G?ran Krusell via groups.io wrote:

p. 6-36. 4 * MP101, 6-32.
G?ran