Model: 4991-025

Electrical Frequency Meter

Properties:

Overall Length
7.000 inches
Center To Center Distance Between Mounting Facilities Parallel To Length
3.375 inches
Center To Center Distance Between Mounting Facilities Parallel To Width
3.375 inches
Overall Height
4.500 inches
Overall Width
4.500 inches
Mounting Hole Diameter
0.315 inches
Scale Division Quantity
100 single indicator single range
Installation Design
Panel
Mounting Arrangement Style
Four hole/stud rectangular/square
Dial Scale Marking Color
Black single indicator single range
Accuracy In Percent
-1.0 to 1.0 at full scale single indicator single range
Meter Depth Behind Mounting Flange
6.459 inches
Meter Body Diameter Behind Mounting Flange
4.000 inches
Movement Type
Moving coil, permanent magnet
Background Color
White single indicator single range
Mounting Facility Type And Quantity
4 unthreaded hole
Measurement Range
+395.0 to 405.0 hertz single indicator single range
Features Provided
Zero adjuster
Circuit Attachment Method And Quantity
2 threaded stud
Style Designator
Rectangular flush mtg
Test Data Document
81349-mil-23167 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).
Test Data Document
81349-mil-m-23167 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).
NSN
6625-00-240-7524
Part Number
4991-025
Description
Meter,electrical Frequency
CAGE
15309

An instrument which measures the rate of regularly recurring variations in an electric current or voltage and is usually calibrated in hertz (cycles per second or cps). The value may be expressed by means of a pointer and calibrated dial vibrating reed or a digital read out display. For instruments which measure radio frequencies, see calibrator, frequency; and wavementer. excludes: counter electronic digital.

Part 4991-025 NSN 6625-00-240-7524

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
16454
FIIG:
A310A0
Concept No.:
App. Key:
A
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
P
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
3.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
061700
UFC:
34580
LTL:
RATING VARIABLE
LCL:
--
WCC:
658
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

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Schedule B and Export
  • Schedule B: 9030908030
  • SITC: 87479
  • End Use: Measuring, testing, control instruments
  • NAICS: 334515
  • USDA: 1

Freight Class: Parts and accessories of articles of schedule b subheading 9030.39

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