MIL-DTL-917F(SH)
3.13.7.4 Fastening of brittle materials. Guidance for fastening of brittle materials can be found in
MIL-HDBK-454.
3.13.8 Meters and instruments, electrical indicating, and accessories.
3.13.8.1 Electrical indicating meters. Where high impact meters that meet the shock test requirements of
MIL-S-901 are required, they shall be selected from the following specifications: MIL-PRF-10304,
MIL-DTL-3971, MIL-DTL-16034, MIL-M-16125, MIL-V-23151, MIL-M-23167, or MIL-M-24359.
3.13.8.1.1 Indicating meter accessories. Insofar as practicable, indicating meter accessories such as shunts,
resistors, and instrument transformers shall be in accordance with MIL-I-1361.
3.13.8.2 Digital indicators. Digital indicators shall be in accordance with MIL-DTL-28803 or as specified in
the equipment specifications.
3.13.8.2.1 Isolation of outputs. Isolation shall be used among the various instrument outputs such that shorting
or opening any digital output circuit will not produce a change in any other output in excess of the specified
accuracy requirements.
3.13.8.3 Frequency meters. Frequency meters shall be in accordance with MIL-M-23167.
3.13.9 Indicator lights.
3.13.9.1 Preferred indicator lights. The preferred indicator light shall contain light emitting diodes (LEDs) in
accordance with A-A-59781 or MIL-DTL-28803 and MIL-DTL-28803/1. Indicator lights that incorporate LEDs
shall have a minimum display height of 0.29 inch. Indicator lights that incorporate LEDs shall be maintainable with
the capability to be easily removed for replacement without disassembly of the equipment or replacement of circuit
boards or LED mounting assemblies.
3.13.9.2 Alternative indicator lights for standard and non-standard voltages and frequencies and DC circuits.
Indicator lights for standard AC voltages and frequencies shall be Style LH94 or LH98 in accordance with
MIL-DTL-3661 and MIL-L-3661/61 or MIL-L-3661/65. Indicator lights for non-standard voltages and frequencies
and for DC circuits shall be Style LH95 or LH96, for use with resistors, in accordance with MIL-L-3661/62 and
MIL-L-3661/63.
3.13.9.3 Lamp types. Lamps for use with the Style LH94 or LH98 indicators shall be in accordance with
MIL-L-3661/61 and MIL-L-3661/65, respectively. Lamps for use with the Style LH95 or LH96 indicators shall be
in accordance with MIL-L-3661/62 and MIL-L-3661/63, respectively. The lamp accommodation number shall be
marked on the indicator lamp holder.
3.13.9.4 Indicator lenses, mounting, and color. Indicator lights shall be provided with flush mounting type
lenses. Finish paint shall be gray. Indicator light styles shall be applied to indicator lens styles as shown in
table XX. Alarm lights shall be in accordance with MIL-DTL-3661. Indicator light lens colors and color use shall
be in accordance with MIL-STD-1472. Indicator lenses designed for spray-tight, water-tight, and submersible
enclosures shall meet the tightness requirements of MIL-DTL-2036.
TABLE XX. Indicator style and specifications.
Light style
Lens style
Lens specifications
LH94, LH95, LH96, LH98
LC41
MIL-L-3661/55
LC42
MIL-L-3661/56
LC43
MIL-L-3661/57
LC45
MIL-L-3661/59
3.13.10 Jacks, tip (test point jacks). Tip jacks shall be selected from MIL-DTL-39024. Banana plugs shall not
be used as test points.
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