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Electrical Frequency Meters
Part 4991-027
Model #4991-027
Electrical frequency meter (NSN 6625-00-879-4101)
Special Features
120v and 400hz rated voltage and freq
Center To Center Distance Between Mounting Facilities Parallel To Length
3.376 inches
Center To Center Distance Between Mounting Facilities Parallel To Width
3.376 inches
Overall Height
4.687 inches
Overall Width
4.687 inches
Mounting Stud Length
1.469 inches
Furnished Items And Quantity
Impedor 1
Indicator Type
Dial w/pointer
Installation Design
Panel
Mounting Arrangement Style
Four hole/stud rectangular/square
Frequency Response Range
+350.000/+450.000 hertz
Unable To Decode
Unable to decode or unable to decode
Meter Depth Behind Mounting Flange
3.875 inches
Meter Body Diameter Behind Mounting Flange
4.000 inches
Mounting Facility Type And Quantity
4 threaded stud
Measurement Range
+350.0/+450.0 hertz single indicator single range
Mounting Stud Diameter
0.250 inches
Features Provided
Zero adjuster
Circuit Attachment Method And Quantity
3 solder stud
Nuclear Hardness Critical Feature
Nonhardened
Style Designator
Rectangular flush mtg
Fsc Application Data
Test set, elect. Equip.
Description
Meter,electrical Frequency
Cage Code
15309
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Part Number:
4991-027
NSN 6625-00-879-4101
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Updated: 07/04/2024