NAS 4121 , "Heat Sink, Electrical-Electronic Component, Semiconductor Devices, Formed", was adopted on 31 Mar
1997 for use by the Department of Defense (DoD). Proposed changes by DoD activities must be submittedto the
DoD adopting activity: Defense Supply Center - Columbus, Attn: DSCC-VAM 3990 E. Broad St., Columbus, OH
43216-5000. DoD activites may obtain copies of this standard from the Standardization Document Order Desk, 700
Robbins Avenue, Building 4D, Philadelphia, PA 191 11-5094. The private sector and other government agencies
may purchase copies from Global Engineering Documents, 15 InvernessW ay East, Englewood, CO 80112-5704,
telephone 800-854-71 79 or 303-792-21 81.