This is the style of recharge port that lightsaber builders have been using for years.
Not all recharge ports are created equally.
This port is from the brand Switch Craft which as an industry trusted brand for reliability and performance.
This port comes with 2 nuts and washer to secure it in your saber. You can use either or nut, or both.
It comes with standard hex nut and also a very galaxy far away looking knurled nut.
The newer version actually come in red which the manufacture started doing to signifying a high quality part