Helo helmet cords fit the HGU-56/P, HGU-84/P, SPH-5, SPH-4B, and SPH-4 helmets.

Alpha Eagle helmet cords fit the Alpha Eagle and other Alpha helmets.

Fixed-wing helmet cords fit the HGU-55 series of helmets, HGU-68/P HGU-33/P, HGU-26, HGU-2 A/P,  and other fixed wing helmets.