PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4166-28A25-2ATransmitter,pressure

Honeywell Intl Inc Defense Avionics Systems · NSN 6620-00-531-2746 · FSC 6620 · No Item Name Available
Verified by PartsTable
NSN 6620-00-531-2746 — this item is cataloged by the U.S. Government under National Stock Number 6620-00-531-2746. Primary manufacturer part number: 4166-28A25-2A.
Features
  • Transmitter,pressure — FSC 6620
  • Nondefinitive Spec/std Data: E-5 TYPE
  • Voltage Rating: 26.0 VOLTS NOMINAL LOCATION NOT OTHERWISE SPECIFIED
  • Mounting Method: HOLE
  • Connector Controlling Agency: AN
  • Mechanical Connection Type: INTERNAL PIPE
  • Electrical Connection Identifying Number: PART NO. AN31Q2-14S-2P
  • Mechanical Connection Quantity: 2
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transmitter,pressure, cataloged under National Stock Number 6620-00-531-2746, 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 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6620-00-531-2746
Primary Part Number4166-28A25-2A
Item NameTransmitter,pressure
FSC / FSG6620 / 66 — No Item Name Available
ManufacturerHoneywell Intl Inc Defense Avionics Systems
StatusACTIVE
Nondefinitive Spec/std DataE-5 TYPE
Voltage Rating26.0 VOLTS NOMINAL LOCATION NOT OTHERWISE SPECIFIED
Mounting MethodHOLE
Connector Controlling AgencyAN
Mechanical Connection TypeINTERNAL PIPE
Electrical Connection Identifying NumberPART NO. AN31Q2-14S-2P
Mechanical Connection Quantity2
Measurement Range+0.0 TO 1000.0 POUNDS PER SQUARE INCH LBS
Mechanical Connection Size7/16 IN. DIA IN
Frequency Rating400.0 HERTZ NOMINAL LOCATION NOT OTHERWISE SPECIFIED
Actuation MethodBOURDON TUBE
Contact TypePIN
PhaseSINGLE LOCATION NOT OTHERWISE SPECIFIED
FSC Application DataENGINE INSTRUMENT,ACFT
Mounting Device Quantity4
Contact Quantity4
Overall Thickness2.563 INCHES NOMINAL IN
Electrical Connection Quantity1
Current TypeAC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
6620-00-233-68391358-041040 INTERCHANGEABLE
Transmitter,pressure
Elbitamerica, Inc.
6685-00-526-7864 INTERCHANGEABLE
Transmitter,pressure
6620-00-526-7890ST3A INTERCHANGEABLE
Transmitter,pressure
Ametek, Inc. Div Aerospace & Defense
6620-00-557-0385 INTERCHANGEABLE
Transmitter,pressure
Cross-Reference Index
Part NumberManufacturer
MS28005-4 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
4166-28A25-2A PRIMARY Honeywell Intl Inc Defense Avionics Systems (USA)
MIL-T-25307 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
4166-28A25-2A Honeywell Intl Inc Defense Avionics Systems Former Bendix Navigation and Control Systems (USA)
Related Parts
6620-00-233-6839INTERCHANGEABLE
TRANSMITTER,PRESSURE
1358-041040
6685-00-526-7864INTERCHANGEABLE
TRANSMITTER,PRESSURE
6620-00-526-7890INTERCHANGEABLE
TRANSMITTER,PRESSURE
ST3A
6620-00-557-0385INTERCHANGEABLE
TRANSMITTER,PRESSURE

Frequently Asked Questions

What is NSN 6620-00-531-2746?

NSN 6620-00-531-2746 is a Transmitter,pressure, manufactured by Honeywell Intl Inc Defense Avionics Systems, classified under FSC 6620 (No Item Name Available). Status: active.

What are the part numbers for NSN 6620-00-531-2746?

NSN 6620-00-531-2746 has 4 cross-referenced part numbers: MS28005-4 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 4166-28A25-2A (Honeywell Intl Inc Defense Avionics Systems), MIL-T-25307 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), 4166-28A25-2A (Honeywell Intl Inc Defense Avionics Systems Former Bendix Navigation and Control Systems).

What NSN replaces 6620-00-531-2746?

There are 4 known substitutes for 6620-00-531-2746: 6620-00-233-6839, 6685-00-526-7864, 6620-00-526-7890 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4166-28A25-2A?

Key specifications for 4166-28A25-2A: Nondefinitive Spec/std Data: E-5 TYPE; Overall Length: 7.031 INCHES NOMINAL IN; Voltage Rating: 26.0 VOLTS NOMINAL LOCATION NOT OTHERWISE SPECIFIED; Mounting Method: HOLE. 21 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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