"The item is a CRES PER QQ-S-764 TYPE 303 condition A, cold finished, passivated per Finish 5.4.1 of MIL-STD-171, black oxide per Class 4 of MIL-C-13924. It has a diameter of 0.579 in and a thickness of 0.205 in."
AGAV
End Item Identification and Description
"The end item identification is AN/ASG-30, optical sight system, lead computing."