Vault access panel

The Vault access panel is a type of architectural item used in Vault-Tec Vaults. An access panel is a thin square metal panel with a handle. The front of the panel is marked by a raised X with a protruding center set within a depression. Panel's back is smooth. In the typical wall section of a corridor, two of these panels are arranged vertically. Vault residents use the access panels for concealing pipes when they aren't undergoing maintenance. Access panels are located in all corridor segments.

Vault 101
On July 13, 2268, near the Cafeteria, the maintenance technician Stanley Armstrong removes two access panels from a wall section. He is doing routine maintenance on the underlying pipes.

On August 3, 2274, Mr. Armstrong leaves two access panels with Andy near a vent as he visits the Clinic.