From here. And not just TO-39 but TO-5 also. TO-5 is taller (which makes it a better size if we agree that the washer was forced onto it) It is weird that you missed, we are talking about it since pages that it is more likely the better match than the Motorola find.
Sorry it's about the washers now.
I found these, called recessed washers.
An average 2N4897 transistor's size is between 7.75-8.51mm according to this datasheet, so I suppose the washer size what we need is size 5/16" which is 7.9mm. That would be MS20002C5. As you can see on...
Im okay with soldering, and I ordered a new soldering station already, some flux, iron, “3rd hand” clips. But I have no idea about capacitors and resistors and whatnots :confused: Anyway. I’ll buy the major parts and figure out the rest later:)
The washer seems like is a DIN 6319 type D (female) variant. I don't know if it ever came up, but since I've never seen it anywhere there might be someone else who haven't either.
It mostly goes under the name Spherical Washer but sometimes it is mistaken by Conical Washers.