PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4165-21B25Transmitter,pressure

Honeywell Intl Inc Defense Avionics Systems · NSN 6620-00-626-2604 · FSC 6620 · No Item Name Available
Verified by PartsTable
NSN 6620-00-626-2604 — this item is cataloged by the U.S. Government under National Stock Number 6620-00-626-2604. Primary manufacturer part number: 4165-21B25.
Features
  • Transmitter,pressure — FSC 6620
  • Contact Quantity: 4
  • Mechanical Connection Type: INTERNAL PIPE
  • Mechanical Connection Quantity: 2
  • Mechanical Connection Size: 0.4375 IN. DIA IN
  • Measurement Range: +0.0 TO 100.0 POUNDS PRESSURE PER SQUARE INCH LBS
  • Mounting Method: HOLE
  • Electrical Connection Identifying Number: PART NO. AND10066-14S-2P
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transmitter,pressure, cataloged under National Stock Number 6620-00-626-2604, is classified within Federal Supply Class 6620 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Honeywell Intl Inc Defense Avionics Systems. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6620-00-626-2604
Primary Part Number4165-21B25
Item NameTransmitter,pressure
FSC / FSG6620 / 66 — No Item Name Available
ManufacturerHoneywell Intl Inc Defense Avionics Systems
StatusCANCELLED
Contact Quantity4
Mechanical Connection TypeINTERNAL PIPE
Mechanical Connection Quantity2
Mechanical Connection Size0.4375 IN. DIA IN
Measurement Range+0.0 TO 100.0 POUNDS PRESSURE PER SQUARE INCH LBS
Mounting MethodHOLE
Electrical Connection Identifying NumberPART NO. AND10066-14S-2P
Connector Controlling AgencyAND
Frequency Rating400.0 HERTZ NOMINAL LOCATION NOT OTHERWISE SPECIFIED
FSC Application DataTRANSMITTER,PRESSURE,ENGINE INSTRUMENT
Nondefinitive Spec/std DataMS28005-2 TYPE
Mounting Device Quantity4
PhaseSINGLE LOCATION NOT OTHERWISE SPECIFIED
Voltage Rating26.0 VOLTS NOMINAL LOCATION NOT OTHERWISE SPECIFIED
Electrical Connection Quantity1
Actuation MethodBOURDON TUBE
Contact TypePIN
Overall Thickness2.625 INCHES NOMINAL IN
Current TypeAC
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
5977-00-038-0998 INTERCHANGEABLE
Holder,electrical Contact Brush
5305-00-774-3918203566 INTERCHANGEABLE
Screw,machine
Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems
5999-00-931-7114RET018-140-1D INTERCHANGEABLE
Mounting Pad,electrical-Electron
Robison Electronics Inc
6620-00-999-2424 INTERCHANGEABLE
Transmitter,pressure
4820-01-198-1098280052-0002 INTERCHANGEABLE
Valve,check
Marotta Controls Inc
4820-01-198-1179180325-0030 INTERCHANGEABLE
Retainer,disk,valve
Marotta Controls Inc
4820-01-199-66312800527-2980 INTERCHANGEABLE
Valve,check
Marotta Controls Inc
4810-01-199-6632180272 INTERCHANGEABLE
Actuator,valve
Marotta Controls Inc
Cross-Reference Index
Part NumberManufacturer
4165-21B25 Honeywell Intl Inc Defense Avionics Systems (USA)
4165-21B25 Honeywell Intl Inc Defense Avionics Systems Former Bendix Navigation and Control Systems (USA)
28005-2 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5977-00-038-0998INTERCHANGEABLE
HOLDER,ELECTRICAL CONTACT BRUSH
5305-00-774-3918INTERCHANGEABLE
SCREW,MACHINE
203566
5999-00-931-7114INTERCHANGEABLE
MOUNTING PAD,ELECTRICAL-ELECTRON
RET018-140-1D
6620-00-999-2424INTERCHANGEABLE
TRANSMITTER,PRESSURE
4820-01-198-1098INTERCHANGEABLE
VALVE,CHECK
280052-0002
4820-01-198-1179INTERCHANGEABLE
RETAINER,DISK,VALVE
180325-0030
4820-01-199-6631INTERCHANGEABLE
VALVE,CHECK
2800527-2980
4810-01-199-6632INTERCHANGEABLE
ACTUATOR,VALVE
180272

Frequently Asked Questions

What is NSN 6620-00-626-2604?

NSN 6620-00-626-2604 is a Transmitter,pressure, manufactured by Honeywell Intl Inc Defense Avionics Systems, classified under FSC 6620 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6620-00-626-2604?

NSN 6620-00-626-2604 has 3 cross-referenced part numbers: 4165-21B25 (Honeywell Intl Inc Defense Avionics Systems), 4165-21B25 (Honeywell Intl Inc Defense Avionics Systems Former Bendix Navigation and Control Systems), 28005-2 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 6620-00-626-2604?

There are 8 known substitutes for 6620-00-626-2604: 5977-00-038-0998, 5305-00-774-3918, 5999-00-931-7114 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4165-21B25?

Key specifications for 4165-21B25: Contact Quantity: 4; Mechanical Connection Type: INTERNAL PIPE; Mechanical Connection Quantity: 2; Mechanical Connection Size: 0.4375 IN. DIA IN. 21 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6620-00-626-2604 still in active supply?

NSN 6620-00-626-2604 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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