Spigot to join two Delrin tubes for antenna array

A local friend asked me to make up a joining spigot to fix two 40mm Delrin tubes together. Nice simple job. I made it a very tight hammer-in fit and knurled part of the 20mm sections to help prevent any rotation or creep.

20mm spigot with knurled section and 40mm collar
Spigot fitted into the two Delrin tubes

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