scope:

This specification covers the general requirements for manually operated illuminated push button switches, switch assemblies (see 6.4.1), and associated modular subassemblies. As used in this specification, the term "switches" shall include the associated modular subassemblies, including switches, indicator lights, actuators, lenses, color filters, panel seals, barriers, and so forth.

The enclosure design is identified by a single digit in accordance with table I. TABLE I. Enclosure design.

Symbol Seal ------------------------------------------------------ 1 Unsealed 2 Dripproof 1/ 3 Watertight 1/ 4 Splashproof 1/ * 1/ In accordance with MIL-STD-108.

The temperature characteristic is identified by a single digit, indicating the temperature range of the switch in accordance with table II. TABLE II. Temperature characteristic.

Symbol Operating Temperature range -------------------------------------------------- Minimum Maximum 1 −55°C +85°C

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Defense * Electronics Supply Center, ATTN: DESC-EMM, Dayton, OH 45444-5283 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

The vibration grade is identified by a single digit in accordance with table III. TABLE III. Vibration grade.

Symbol Frequency Acceleration level range ------------------------------------------------------------------------------------- 1 10-5 Hz 0.06 inch total excursion, method 201 of MIL-STD-202 2 10-500 Hz 10 g peak, test condition A, method 204 of MIL-STD-202 3 10-2,000 Hz 15 g peak, test condition B, method 204 of MIL-STD-202

The operation of the switch is identified by a single letter in accordance with table IV. TABLE IV. Operation.

Operation Symbol ------------------------------------------------- Momentary action A Alternate action B Push pull C Magnetically held D Position indicating, alternate action E Position indicating, magnetically held F Sequence action G * Indicator light only H

The color of the lens shall be identified by a single letter in accordance with table V. TABLE V. Color.

Symbol Illuminated color ---------------------------- R Red G Green Y Yellow B 1/ Blue W White V Violet O Opaque H NVIS Green A J NVIS Green B K NVIS Yellow L NVIS Red 1/ Blue is not recommended and should be used only when absolutely necessary.

The lens display is designated by a single letter in accordance with table VI. TABLE VI. Display type.

Symbol Display --------------------------------------------------------- C Colored background (Shows color both when nonilluminated and illuminated). W White background (White until illuminated, then background appears in color). S Sunlight readable (Legend not visible until illuminated, then legend appears in color. Background is black). N Opaque background, visible legend with illuminating characters. H Hidden legend. Same as display type S except contrast requirements do not apply. B Hidden legend (black legend on an obscure background) when unlighted. When illuminated, legend is black and the background appears in color. The display shall not appear energized in the unlighted condition.

The term Part or Identifying Number (PIN) is equivalent to the term part number which was previously used in this specification. The military PIN (when applicable) shall consist of the letter "M", the basic number of the specification sheet, and an assigned dash number (see 3.1), as shown in the following example:

intended Use: