Adapter plate for mounting up to four MR-50 boards within the NCL enclosure. Includes: (1) Adapter plate (16) 6-32x3/8 zinc plated Philips machine screws (16) #6 zinc plated split lock-washers Description 2 ACU Panel Mounting Adapter Plate for NCL Enclosure Adapter plate for mounting up to two ACT365 ACU boards within the NCL enclosure. Includes: (1) Adapter plate (4) 6-32x3/8 zinc plated Philips machine screws