PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FTS 4065Frequency Standard

Microsemi Frequency and Time Corp · NSN 6625-01-391-9080 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-01-391-9080 — this item is cataloged by the U.S. Government under National Stock Number 6625-01-391-9080. Primary manufacturer part number: FTS 4065.
Features
  • Frequency Standard — FSC 6625
  • Frequency Rating: 47.0 HERTZ MINIMUM AND 400.0 HERTZ MAXIMUM
  • Unit Type: STANDARD
  • Phase: SINGLE
  • Recording Device Accommodation: NOT PROVIDED
  • Mounting Method: RACK
  • AC Voltage Rating: 115.0 VOLTS NOMINAL AND 230.0 VOLTS NOMINAL
  • Unpackaged Unit Weight: 63.000 POUNDS LBS
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Frequency Standard, cataloged under National Stock Number 6625-01-391-9080, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Microsemi Frequency and Time Corp. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-01-391-9080
Primary Part NumberFTS 4065
Item NameFrequency Standard
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerMicrosemi Frequency and Time Corp
StatusACTIVE
Frequency Rating47.0 HERTZ MINIMUM AND 400.0 HERTZ MAXIMUM
Unit TypeSTANDARD
PhaseSINGLE
Recording Device AccommodationNOT PROVIDED
Mounting MethodRACK
AC Voltage Rating115.0 VOLTS NOMINAL AND 230.0 VOLTS NOMINAL
Unpackaged Unit Weight63.000 POUNDS LBS
Individual Channel Frequency1.0 MEGAHERTZ NOMINAL AND 5.0 MEGAHERTZ NOMINAL AND 10.0 MEGAHERTZ NOMINAL
Frequency Range Rating+1.000 TO 10.000 MEGAHERTZ
Frequency Rating47.0 HERTZ MINIMUM AND 400.0 HERTZ MAXIMUM
Unit TypeSTANDARD
PhaseSINGLE
Recording Device AccommodationNOT PROVIDED
Mounting MethodRACK
AC Voltage Rating115.0 VOLTS NOMINAL AND 230.0 VOLTS NOMINAL
Unpackaged Unit Weight63.000 POUNDS LBS
Individual Channel Frequency1.0 MEGAHERTZ NOMINAL AND 5.0 MEGAHERTZ NOMINAL AND 10.0 MEGAHERTZ NOMINAL
Frequency Range Rating+1.000 TO 10.000 MEGAHERTZ
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeS
Unit of IssueEA
SMR CodeVS
Weight25.0000 lbs
Cube8.0000 cu ft
Verified Substitutes 12
Lead,test
6645-00-225-26864065 INTERCHANGEABLE
Hammer,clock
Wakmann Watch Company Inc
9540-00-261-5099 INTERCHANGEABLE
Angle,structural
5985-00-261-77534065 INTERCHANGEABLE
Coupler,transmission Line
Narda Holdings, Inc. Dba Narda-Miteq Div Narda-Miteq
4940-00-391-4627 INTERCHANGEABLE
Shaft and Casing
5950-00-461-81444065 INTERCHANGEABLE
Transformer,pulse
Sartron, Inc
2805-00-793-2357966P INTERCHANGEABLE
Piston,internal Combustion Engin
Federal-Mogul Corp Government Sales Dept
5330-00-795-4090BA1531 INTERCHANGEABLE
Gasket
Stillman Seal Corporation Div Stillman Seal Corperation
5355-00-903-4034 INTERCHANGEABLE
Pointer,dial
5962-01-097-32254065 INTERCHANGEABLE
Microcircuit
Data Device Corp Dba Beta Transformer Technology
Cross-Reference Index
Part NumberManufacturer
FTS 4065 PRIMARY Microsemi Frequency and Time Corp (USA)
4065 Microsemi Frequency and Time Corp (USA)
Related Parts
6625-01-012-9083SUCCESSOR
LEAD,TEST
6645-00-225-2686INTERCHANGEABLE
HAMMER,CLOCK
4065
9540-00-261-5099INTERCHANGEABLE
ANGLE,STRUCTURAL
5985-00-261-7753INTERCHANGEABLE
COUPLER,TRANSMISSION LINE
4065
4940-00-391-4627INTERCHANGEABLE
SHAFT AND CASING
5950-00-461-8144INTERCHANGEABLE
TRANSFORMER,PULSE
4065
2805-00-793-2357INTERCHANGEABLE
PISTON,INTERNAL COMBUSTION ENGIN
966P
5330-00-795-4090INTERCHANGEABLE
GASKET
BA1531
5355-00-903-4034INTERCHANGEABLE
POINTER,DIAL
5962-01-097-3225INTERCHANGEABLE
MICROCIRCUIT
4065
5340-01-309-7670INTERCHANGEABLE
BUMPER
0N365090-1
4820-01-340-0282INTERCHANGEABLE
VALVE,ANGLE
4065-B

Frequently Asked Questions

What is NSN 6625-01-391-9080?

NSN 6625-01-391-9080 is a Frequency Standard, manufactured by Microsemi Frequency and Time Corp, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-01-391-9080?

NSN 6625-01-391-9080 has 2 cross-referenced part numbers: FTS 4065 (Microsemi Frequency and Time Corp), 4065 (Microsemi Frequency and Time Corp).

What NSN replaces 6625-01-391-9080?

There are 12 known substitutes for 6625-01-391-9080: 6625-01-012-9083, 6645-00-225-2686, 9540-00-261-5099 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FTS 4065?

Key specifications for FTS 4065: Frequency Rating: 47.0 HERTZ MINIMUM AND 400.0 HERTZ MAXIMUM; Unit Type: STANDARD; Phase: SINGLE; Recording Device Accommodation: NOT PROVIDED. 28 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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