NASM1661 O, “PIN, TAPPERED, PLAIN”, was adopted on 20 MARCH 2000 for use by’the Department
of Defense (DoD). Proposed changes by DoD Activities must be submitted to the DoD Adopting Activity:
Defense Supply Center Philadelphia, ATTN: DSCP-ILEA, 700 Robbins Avenue, Philadelphia, PA
191 1 1-5096. DoD Activities may obtain copies of this standard from the Standardization Document Order
Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 191 1 1-5094. The private sector and other
Government agencies may purchase copies from the AEROSPACE INDUSTRIES ASSOCIATION OF
AMERICA, INC., 1250 EYE STREET, N. W., WASHINGTON, DC 20005-3924.