PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MB-2Transmitter,rate of Flow

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 6620-00-557-0259 · FSC 6620 · No Item Name Available
Verified by PartsTable
NSN 6620-00-557-0259 — this item is cataloged by the U.S. Government under National Stock Number 6620-00-557-0259. Primary manufacturer part number: MB-2.
Features
  • Transmitter,rate of Flow — FSC 6620
  • Mounting Method: CLAMP
  • Actuation Method: MOMENTUM TYPE USING IMPELLER AND TURBINE
  • Mechanical Connection Type: INTERNAL PIPE
  • Electrical Connection Controlling Agency: AND
  • FSC Application Data: ENGINE INSTRUMENT,AIRCRAFT
  • Phase: SINGLE
  • Nondefinitive Spec/std Data: MB-2 TYPE
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transmitter,rate of Flow, cataloged under National Stock Number 6620-00-557-0259, is classified within Federal Supply Class 6620 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6620-00-557-0259
Primary Part NumberMB-2
Item NameTransmitter,rate of Flow
FSC / FSG6620 / 66 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Mounting MethodCLAMP
Actuation MethodMOMENTUM TYPE USING IMPELLER AND TURBINE
Mechanical Connection TypeINTERNAL PIPE
Electrical Connection Controlling AgencyAND
FSC Application DataENGINE INSTRUMENT,AIRCRAFT
PhaseSINGLE
Nondefinitive Spec/std DataMB-2 TYPE
Current TypeAC/DC
Overall Thickness3.437 INCHES NOMINAL IN
Mechanical Connection Quantity2
Electrical Connection Quantity2
Voltage Rating115.0 VOLTS NOMINAL AND 28.0 VOLTS NOMINAL
Mechanical Connection Size1-5/8 INCH DIAMETER IN
Terminal Quantity7
Attachment Feature Quantity2
Frequency Rating400.0 HERTZ NOMINAL
Measurement Range+0.0 TO 12000.0 POUNDS PER HOUR LBS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4730-00-035-7609T001412532 INTERCHANGEABLE
Elbow,swing Joint
Cleveland Gear Company, Inc. Dba Cleveland Gear Co
6115-00-329-35812200 INTERCHANGEABLE
Generator Set,diesel Engine
Stewart & Stevenson Power Products Llc
5130-00-432-10161127-0005-P10 INTERCHANGEABLE
Brush,fiber,rotary Wheel
Pace, Incorporated Dba Pace Worldwide Inc.
6620-00-515-52088TJ50GAB INTERCHANGEABLE
Transmitter,rate of Flow
Ametek Inc Div Aerospace and Defense
6115-00-583-9859 INTERCHANGEABLE
Generator,alternating Current
6210-00-646-9077 INTERCHANGEABLE
Light,marker,airport Approach
4310-00-683-8850 INTERCHANGEABLE
Compressor Unit,rotary
6620-00-720-32238TJ50GAS5 INTERCHANGEABLE
Transmitter,rate of Flow
Ametek Inc Div Aerospace and Defense
6620-00-726-81538TJ50GAS4 INTERCHANGEABLE
Transmitter,rate of Flow
Ametek Inc Div Aerospace and Defense
1670-01-580-3080FDC8534M4R INTERCHANGEABLE
Tie Down,cargo,aircraft
Davis Aircraft Products Co., Inc.
Cross-Reference Index
Part NumberManufacturer
MB-2 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MILT8249AMENDITY Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-T-8249 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
6620PL1967911 Jednolity Indeks Materialowy - Uniform Material Index (POL)
MILT8249A Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MBA Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MILT8249AMEND1TYPEMB2 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
4730-00-035-7609INTERCHANGEABLE
ELBOW,SWING JOINT
T001412532
6115-00-329-3581INTERCHANGEABLE
GENERATOR SET,DIESEL ENGINE
2200
5130-00-432-1016INTERCHANGEABLE
BRUSH,FIBER,ROTARY WHEEL
1127-0005-P10
6620-00-515-5208INTERCHANGEABLE
TRANSMITTER,RATE OF FLOW
8TJ50GAB
6115-00-583-9859INTERCHANGEABLE
GENERATOR,ALTERNATING CURRENT
6210-00-646-9077INTERCHANGEABLE
LIGHT,MARKER,AIRPORT APPROACH
4310-00-683-8850INTERCHANGEABLE
COMPRESSOR UNIT,ROTARY
6620-00-720-3223INTERCHANGEABLE
TRANSMITTER,RATE OF FLOW
8TJ50GAS5
6620-00-726-8153INTERCHANGEABLE
TRANSMITTER,RATE OF FLOW
8TJ50GAS4
1670-01-580-3080INTERCHANGEABLE
TIE DOWN,CARGO,AIRCRAFT
FDC8534M4R
3130-01-623-5648INTERCHANGEABLE
BEARING UNIT,BALL
64578
5340-01-651-0444INTERCHANGEABLE
BASE,MAGNETIC
MB-2

Frequently Asked Questions

What is NSN 6620-00-557-0259?

NSN 6620-00-557-0259 is a Transmitter,rate of Flow, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 6620 (No Item Name Available). Status: active.

What are the part numbers for NSN 6620-00-557-0259?

NSN 6620-00-557-0259 has 7 cross-referenced part numbers: MB-2 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MILT8249AMENDITY (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-T-8249 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 6620PL1967911 (Jednolity Indeks Materialowy - Uniform Material Index), MILT8249A (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 2 more.

What NSN replaces 6620-00-557-0259?

There are 12 known substitutes for 6620-00-557-0259: 4730-00-035-7609, 6115-00-329-3581, 5130-00-432-1016 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MB-2?

Key specifications for MB-2: Mounting Method: CLAMP; Actuation Method: MOMENTUM TYPE USING IMPELLER AND TURBINE; Mechanical Connection Type: INTERNAL PIPE; Electrical Connection Controlling Agency: AND. 19 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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