Will it fit the tram 269 triple 5" magnet cb antenna mount?

No, the 269 is a 3/8-24 thread mount, not an NMO mount.

Can you put a spring on a wilson 5000

It might be possible but I would not do it. The Wilson 5000 is designed from the factory to tune without a spring. Adding a spring will change the SWR and be difficult to tune.

Will this rain cap fit the male threads on a Wilson 5000 magnet mount? If not, any suggestions? Thanks!

No, a standard Wilson 5000 is not an "NMO" thread. I've seen where you can fill the back/inside of a PL-259 connector with clear silicone caulk, let dry, & that would make a "rain cap" that fits a Wilson Magnetic mount.

Will this fit a Tram 5 inch magnetic base

Yes, but I think that you might have the wrong idea. This cap just covers the mount -- the threaded post with the contact. That's the part that you need to keep dry, because that's where the electrical connection is. Tram/Browning mounts have pretty much the same thread depth, regardless of the size of the base, and this covers my Tram/Browning mount. The main thing is that it's for an NMO thread, and not a PL-259 (like you find on coax) or a 3/8-24 thread (like you'd find on a Firestik CB antenna).

Manufacturer	Tram-Browning
Brand	Tram
Model	Tram 1290 Rain Radio Antenna Cap
Product Dimensions	8 x 8 x 2.54 cm; 13.61 g
Item model number	1290
Exterior	Brushed
Manufacturer Part Number	1290
Special Features	Rain
Item Weight	13.6 g

Tram1290 NMO Rain Cap with O Ring Gasket Heavy-Duty Plastic Fits All NMO Mounts, Black

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