That would be a question for Trijicon, we have no technical specifications for Trijicon optics.
For the SHV 5-20 you will need part numbers A473 for the eyepiece and A468 for the objective.
The eyepiece flip cap for the NXS 3.5-15x50mm F1 scope is part number A473. The Objective flip cap is part number A474.
For the ATACR 7-35x56 you will need part numbers A472 and A468.
No, the caps are sold separately not as a set.
These NightForce Rifle Scope Eyepiece Flip-Up Lens Caps will not be compatible with your NightForce NXS Riflescope. However, we do carry the correct model flip caps for your scope. They can be found by using the link below:
https://www.opticsplanet.com/nightforce-eyepiece-flip-up-lens-caps-nxs-15x-22x-32x-42x.html
Yes, you would need this model:
https://www.opticsplanet.com/v/a539-nightforce-eyepiece-flip-up-lens.html
The part number for the ATACR 7-35x56 F1 eyepiece will be A472
The part numbers for the Flip Up Caps for the SHV 5-20x56 are below.
Eyepiece Flip Cap: A473
Objective Flip Cap: A468