scope:

This specification covers one type of elapsed time mechanical aircraft clock.

The following documents, of the issue in effect on the date of invitation for bid or request for proposal, form a part of this specification to the extent specified herein.

SPECIFICATIONS Federal DD-G-451 Glass, Flat and Corrugated, for Glazing, Mirrors, and other uses QQ-C-320 Chromium Plating (Electrodeposited) QQ-N-290 Nickel Plating (Electrodeposited) QQ-P-416 Plating, Cadmium (Electrodeposited) QQ-Z-325 Zinc Coating, Electrodeposited, Requirements for

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commanding Office, Naval Air Engineering Center, ESSD, Lakehurst, New Jersey 08733 by using the self-addressed Standard Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

SPECIFICATIONS (Continued) Military MIL-P-116 Preservation-packaging, Methods of MIL-M-3171 Magnesium Alloy, Process for Corrosion Protection of MIL-L-3918 Lubricating Oil, Instrument, Jewel Bearing MIL-E-5272 Environmental Testing, Aeronautical and Associated Equipment, General Specification for MIL-C-5541 Chemical Films for Aluminum and Aluminum Alloys MIL-R-6855 Rubber; Synthetic, Sheet, Molded, and Extruded, for Aircraft Applications MIL-S-6872 Soldering Process, General Specification for MIL-S-7742 Screw Threads, Standard, Optimum Selected Series, General Specification for MIL-A-8625 Anodic Coatings, for Aluminum and Aluminum Alloys MIL-N-18307 Nomenclature and Nameplates for Aeronautical Electronic and Associated Equipment MIL-P-23408 Plating: Tin-Cadmium (Electrodeposited) MIL-L-25467 Lighting, Integral, Aircraft Instrument, General Specification for MIL-D-1000 Drawings, Engineering and Associated Lists STANDARDS Federal FED-STD-595 Colors Military MIL-STD-130 Identification Marking of U.S. Military Property MIL-STD-143 Specifications and Standards, Order of Precedence for the Selection of STANDARDS (Continued) Military (Continued) MIL-STD-794 Parts and Equipment, Aeronautical, Preparation for Delivery MIL-STD-889 Dissimilar Metals MS3137 Connectors, Plug, Electric, Solder Type, Short, Push-Pull Coupling MS24367 Lamp, Incandescent - Miniature Integral Lighting MS24515 Lamp - Sub Miniature MS28105 Window, Dial - Aircraft Instrument Cover, Glass MS33558 Numerals and Letters, Aircraft Instrument Dial, Standard Form of

(Copies of specifications, standards, drawings, and publications required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.)

intended Use:

The Clock, Aircraft, Mechanical ABU-9/A covered by this specification is intended for use as the primary timepiece and elapsed-time indicator in aircraft requiring integral red light.