An item usually in the form of a ring, designed to fit on the front of an instrument to secure the window material of the instrument. See also bezel,instrument mounting.
NSN 6220-01-371-3430
NSN 4140-00-881-1052
NSN 6145-01-420-9289
NSN 5996-00-901-0519
NSN 5985-01-311-9965
NSN 6610-01-139-4713
NSN 6105-01-318-2513
NSN 5990-00-621-0572
NSN 5920-01-143-5002
NSN 5930-01-166-4065
NSN 5998-01-328-8288
NSN 5975-00-624-6949