PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

550-3Indicator,sight,liquid

Tobeyco Mfg, Co, Inc. Div Federal Brass Mfg. · NSN 6680-00-106-9544 · FSC 6680 · No Item Name Available
Verified by PartsTable
NSN 6680-00-106-9544 — this item is cataloged by the U.S. Government under National Stock Number 6680-00-106-9544. Primary manufacturer part number: 550-3.
Features
  • Indicator,sight,liquid — FSC 6680
  • Nominal Pipe Size for Which Designed: UNABLE TO DECODE
  • Style Designator: HIGH PRESSURE, FLAT GLASS
  • Distance Between Mounting Facility Centers: 3.250 INCHES NOMINAL IN
  • Furnished Data: LIQUID LEVEL
  • Sight Height: 2.375 INCHES NOMINAL IN
  • Media for Which Designed: HYDRAULIC FLUID
  • Nominal Thread Size: UNABLE TO DECODE
Applications
  • Applications requiring Aluminum Alloy construction
General Description

The Indicator,sight,liquid, cataloged under National Stock Number 6680-00-106-9544, is classified within Federal Supply Class 6680 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Tobeyco Mfg, Co, Inc. Div Federal Brass Mfg.. Government technical data includes 14 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6680-00-106-9544
Primary Part Number550-3
Item NameIndicator,sight,liquid
FSC / FSG6680 / 66 — No Item Name Available
ManufacturerTobeyco Mfg, Co, Inc. Div Federal Brass Mfg.
StatusACTIVE
Nominal Pipe Size for Which DesignedUNABLE TO DECODE
Style DesignatorHIGH PRESSURE, FLAT GLASS
Distance Between Mounting Facility Centers3.250 INCHES NOMINAL IN
Furnished DataLIQUID LEVEL
Sight Height2.375 INCHES NOMINAL IN
Media for Which DesignedHYDRAULIC FLUID
Nominal Thread SizeUNABLE TO DECODE
End Connection TypeUNABLE TO DECODE
Data Furnishing MethodCLEAR WINDOW
MaterialALUMINUM ALLOY
Thread Series DesignatorUNABLE TO DECODE
Maximum Temp Rating160.0 FAHRENHEIT DEGF
Thread DirectionUNABLE TO DECODE
Thread ClassUNABLE TO DECODE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5342-00-410-01198Z64D16 INTERCHANGEABLE
Latch,special
Konecranes Inc Dba Milwaukee Parts Div Crane Pro Parts
5825-00-477-7848003822 INTERCHANGEABLE
Screen,exhaust
Moog Inc Div Moog Inc., Space and Defense - Salt Lake City
3110-00-555-54532-055-005-375 INTERCHANGEABLE
Bearing,ball,annular
Viking Pump, Inc
4820-00-618-72555503 INTERCHANGEABLE
Valve,globe
Dragon Valves Inc
7510-00-629-027355303 INTERCHANGEABLE
Tape,identification
Brady United States
1285-00-891-3296526-7727-003 INTERCHANGEABLE
Filter-Detector Ass
Clifton Metal Products Co Inc
4310-00-980-56015503 INTERCHANGEABLE
Crankcase,compressor
Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor
5133-01-043-7623 INTERCHANGEABLE
Drill,twist
3030-01-057-5893550-3STS INTERCHANGEABLE
Lacing,belt,pin
Flexible Steel Lacing Co
5340-01-079-1231 INTERCHANGEABLE
Clip,spring Tension
Cross-Reference Index
Part NumberManufacturer
550-3 PRIMARY Tobeyco Mfg, Co, Inc. Div Federal Brass Mfg. (USA)
2422410 Naval Sea Systems Command (USA)
LTCT 9340 Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix (USA)
2422410 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
Related Parts
5342-00-410-0119INTERCHANGEABLE
LATCH,SPECIAL
8Z64D16
5825-00-477-7848INTERCHANGEABLE
SCREEN,EXHAUST
003822
3110-00-555-5453INTERCHANGEABLE
BEARING,BALL,ANNULAR
2-055-005-375
4820-00-618-7255INTERCHANGEABLE
VALVE,GLOBE
5503
7510-00-629-0273INTERCHANGEABLE
TAPE,IDENTIFICATION
55303
1285-00-891-3296INTERCHANGEABLE
FILTER-DETECTOR ASS
526-7727-003
4310-00-980-5601INTERCHANGEABLE
CRANKCASE,COMPRESSOR
5503
5133-01-043-7623INTERCHANGEABLE
DRILL,TWIST
3030-01-057-5893INTERCHANGEABLE
LACING,BELT,PIN
550-3STS
5340-01-079-1231INTERCHANGEABLE
CLIP,SPRING TENSION
6680-01-140-8769INTERCHANGEABLE
INDICATOR,SIGHT,LIQUID
550-3
6680-01-183-9057INTERCHANGEABLE
INDICATOR,SIGHT,LIQUID
550-3

Frequently Asked Questions

What is NSN 6680-00-106-9544?

NSN 6680-00-106-9544 is a Indicator,sight,liquid, manufactured by Tobeyco Mfg, Co, Inc. Div Federal Brass Mfg., classified under FSC 6680 (No Item Name Available). Status: active.

What are the part numbers for NSN 6680-00-106-9544?

NSN 6680-00-106-9544 has 4 cross-referenced part numbers: 550-3 (Tobeyco Mfg, Co, Inc. Div Federal Brass Mfg.), 2422410 (Naval Sea Systems Command), LTCT 9340 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix), 2422410 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).

What NSN replaces 6680-00-106-9544?

There are 12 known substitutes for 6680-00-106-9544: 5342-00-410-0119, 5825-00-477-7848, 3110-00-555-5453 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 550-3?

Key specifications for 550-3: Nominal Pipe Size for Which Designed: UNABLE TO DECODE; Style Designator: HIGH PRESSURE, FLAT GLASS; Distance Between Mounting Facility Centers: 3.250 INCHES NOMINAL IN; Furnished Data: LIQUID LEVEL. 16 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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