MIL-DTL-16377J(SH)
3.9.3 Identification plate (explosionproof). An identification plate in accordance with MIL-DTL-15024 and
MIL-P-15024/5, bearing the following legend, in upper case letters, shall be provided for fixtures and lights having
explosionproof or combined explosionproof-watertight enclosures:
"FOR USE IN THE FOLLOWING EXPLOSIVE
ATMOSPHERES: GASOLINE, PETROLEUM,
NAPHTHA, ALCOHOL, ACETONE, LACQUER
SOLVENT VAPORS, AND NATURAL GAS."
The identification plate shall be securely attached to the outside of the fixture where it can best be seen. Where
space permits, this legend may be combined with the aforementioned identification and information plate
(see 3.9.2).
3.9.4 Instruction sheets or tags. When specified in the applicable specification sheet, instruction sheets or tags
providing pertinent design and installation information shall be furnished with the fixtures or parts.
3.10 Interchangeability and standardization.
3.10.1 Interchangeability. Each repair part shall be equal to the original and suitable for replacement without
special tools (see 6.12.5), and without the removal of rivets or pins dependent on a force fit. Mechanical and
electrical interchangeability shall exist between like assembles, subassemblies, units, and replaceable parts,
regardless of the manufacturer or contractor. Interchangeability does not mean identity, but requires that a
substitution of such like assemblies, subassemblies, units, and replaceable parts be easily effected without physical
or electrical modifications to any parts of the lights or assemblies, including globes, lenses, roundels, lamps,
lampholders, wiring, and mounting and without resorting to selection.
3.10.2 Standardization.
3.10.2.1 Component standardization. Standardization of units, assemblies, subassemblies, and parts shall be
accomplished to as great an extent as practicable to simplify supply parts and replacement problems. Electrical and
mechanical interchangeability of units, assemblies, subassemblies, and parts shall conform in detail to the various
individual specification sheets.
3.10.2.2 Equipment standardization. Progressive standardization of complete equipments is required, at least to
the extent that similar articles of different manufacture are electrically and mechanically interchangeable. In order
to accomplish maximum practicable standardization, individual specifications will include requirements as to
mounting dimensions, limiting overall dimensions, and electrical characteristics of individual items of equipment.
Mounting dimensions shall be as specified in the applicable specification sheet and figures 25, 26, and 28.
3.10.2.3 Standard stock parts (see 6.12.6). Standard stock parts and hardware shall be used to the greatest
extent practicable.
3.10.2.4 Proprietary parts. Where Navy standard stock parts are not suited for the purpose intended, parts and
materials shall be used which are standard, easily obtainable, and produced by reliable manufacturers, as far as
possible within the limits of this specification. In order to facilitate the acquisition of replacement parts, the design
shall not be based upon the use of parts of special manufacture where (suitable) units of standard manufacture are
available. Similarly the design shall not be based on the use of parts produced by only one manufacturer when an
equivalent design available from several sources of manufacture might be employed.
3.11 High-temperature fluorescent lighting fixtures. When specified (see 6.2), the procedures specified herein
shall apply when high-temperature fluorescent lighting fixtures are required.
3.11.1 Symbol numbers. A "HT" shall be placed next to the symbol number specified in the applicable
specification sheets to indicate a high temperature modification of the standard lighting fixture (Example: Symbol
Number 77.4HT).
3.11.2 Component substitution. Standard components specified in the applicable specification sheets shall be
substituted with corresponding high-temperature components listed in table III. Other features, except National
Stock Numbers, shall remain as specified in the applicable specification sheets.
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