barbed fitting - spigot vs socket?

[ihateSpirorbids]

For the PF-1000 eshopps HOB overflow, I'm having a hard time figuring out which type of barbed insert I need. I'm trying to hook up a flexible vinyl tubing to the overflow via the barbed fitting. I found 2 types:

Schedule 80 Straight Barb x Female Thread (Socket)
https://www.bulkreefsupply.com/schedule-80-straight-barb-x-female-thread.html
Gray Pipe Adapter Spigot x Barb
https://www.bulkreefsupply.com/gray-male-pipe-adapter-spigot-x-barb.html

The PF-1000 takes 1" Inner diameter. Which one would I use? Does it matter if one is schedule 40 vs schedule 80?

 

[C_AWOL]

It would be the second one you linked to go into the bulkhead itself.

Bulkhead exterior threads aren't meant for other things besides the nut to go over it.