Related Clues:

• Learning ctr.
• 1000th of an inch
• Part of 18-Across: Abbr.
• It may be nav.
• Ens. producer
• Part of a Pentagon web address
• 1/1000 inch
• Bag thickness
• Mil. school
• Metric meas.
• 'Thanks a ___!'
• Wire measure
• Part of USNA
• G squared?
• Measure of thickness