MIL-DTL-16377J(SH)
3.7.6.1.3 Window securing screw assemblies. Windows shall be provided with window securing screw
assemblies as specified on figures 1, 2, and 3. The type and number to be provided shall be as specified in the
applicable specification sheet. When window assemblies are purchased separately for replacement parts, the
following procedures shall be followed (this does not apply to windows shown in MIL-F-16377/18,
MIL-F-16377/65, and MIL-F-16377/66):
a. The center securing screw assembly(ies) (all except those at the two extreme ends) shall be snugly fitted
b.
A Type VI label shall be provided with each window assembly as specified in 3.9.1.8.6.
3.7.6.1.4 Notches. When dimples or pins, as specified on figure 7, are used to retain window gasket in its
groove, notches to clear these dimples or pins shall be filed on the sides of the window as shown in the applicable
specification sheet and figure 27. Notches are not required when a continuous gasket retainer is used. Notches are
required on windows when they are furnished separately from the lighting fixtures as replacement parts.
3.7.6.2 Windows and window assemblies for type III luminaires. Windows and window assemblies for
Type III luminaires can be designed to manufacturer s discretion.
3.7.6.2.1 Material for windows. Material for windows shall be at manufacturer s discretion provided it meets
the requirements of 3.4.
3.7.6.2.1.1 Optical uniformity. Windows shall be free from defects, such as imbedded particles, bubbles,
scratches, blemishes, and striation, which will seriously affect the optical properties.
3.7.6.2.2 Louver assembly. When a louver assembly is required for directional light output, it shall be as
specified in the applicable specification sheet and herein. Finish shall be as specified in 3.8.4.2.
3.7.6.2.2.1 Material. Material for louver assemblies shall be aluminum. Mounting hardware and grounding
straps are excluded.
3.7.6.2.2.2 Attachment to window. The louver assembly shall be attached to the window as per manufacturer s
discretion. Attaching louvers to watertight luminaires shall not compromise the watertight integrity of the luminaire.
3.7.6.2.2.3 Louver grounding. The louver assembly shall be grounded to the fixture housing through the
mounting devices.
3.7.7 Lenses, globes, roundels, and windows for type II fixtures. Plastic lenses and windows shall be as
specified in the applicable specification sheet. Glass lenses, globes, roundels, and windows, referred herein as
glassware, shall be as specified in the applicable specification sheet and herein.
3.7.7.1 Optical uniformity. Glassware shall be free from defects that will prevent conformance with the light
output requirements specified in the applicable specification sheet. Finished glassware shall be free from air
bubbles, striae, wrinkles, mold marks, chipped edges, or any other blemishes which may affect the optical qualities.
3.7.7.2 Material. Glassware shall be made of high-impact, heat resistant glass of a type that will withstand all
requirements specified in the applicable specification sheet. The glass shall be of such composition and quality as to
withstand exposure to atmospheric sea conditions, particularly that of salt water, high humidity, and bright sunlight,
without etching, discoloration, or any change in the light transmittance. Flashed glass shall not be used.
3.7.7.3 Edges. The edges of all glassware shall be ground or molded to a true surface.
3.7.7.4 Colored glassware. Colored glassware shall be colored material throughout the entire thickness of the
portions designed for light transmission.
3.7.7.5 Painted glassware. Those portions of the glassware designated by the applicable specification sheet to
be painted shall be uniformly coated with inorganic baking enamel. The color shall be as specified in the applicable
specification sheet. The glassware shall be baked at such a temperature and period of time as to ensure adhesion of
the enamel to the glass. There shall be no evidence of loosening or softening or other dissolution of the enamel
when glassware is tested as specified in 4.8.17.2.
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