PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40221/61-999-000Indicator,sight,liquid

Curtiss-Wright Flow Control Corporation Dba Curtiss-Wright Flow Control Co Div Curtiss-Wright / Nu-Torque · NSN 6680-01-550-8105 · FSC 6680 · No Item Name Available
Verified by PartsTable
NSN 6680-01-550-8105 — this item is cataloged by the U.S. Government under National Stock Number 6680-01-550-8105. Primary manufacturer part number: 40221/61-999-000.
Features
  • Indicator,sight,liquid — FSC 6680
  • 4 verified cross-references
  • Primary manufacturer: Curtiss-Wright Flow Control Corporation Dba Curtiss-Wright Flow Control Co Div Curtiss-Wright / Nu-Torque
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Indicator,sight,liquid, cataloged under National Stock Number 6680-01-550-8105, is classified within Federal Supply Class 6680 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Curtiss-Wright Flow Control Corporation Dba Curtiss-Wright Flow Control Co Div Curtiss-Wright / Nu-Torque. This item has 4 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.

Catalog Facts
Item NameIndicator,sight,liquid
FSC / FSG6680 — No Item Name Available (FSG 66)
ManufacturersCurtiss-Wright Flow Control Corporation Dba Curtiss-Wright Flow Control Co Div Curtiss-Wright / Nu-Torque (CAGE 63600)
Technical Specifications
ParameterValue
NSN6680-01-550-8105
Primary Part Number40221/61-999-000
Item NameIndicator,sight,liquid
FSC / FSG6680 / 66 — No Item Name Available
ManufacturerCurtiss-Wright Flow Control Corporation Dba Curtiss-Wright Flow Control Co Div Curtiss-Wright / Nu-Torque
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3455-00-230-7026305-24 INTERCHANGEABLE
Cutter,milling,side
Kennametal Inc. Div Kennametal Industrial Products Group
5930-00-273-0778TH3221 INTERCHANGEABLE
Switch,box
General Electric Co Electrical Distribution and Control
5330-00-291-6371162G12 INTERCHANGEABLE
Seal,plain Encased
Skf Usa Inc. Dba Skf Aerospace Sealing Solutions
5999-00-417-041340-221 INTERCHANGEABLE
Contact,electrical
Eaton Corp Opns & Technical Center
5305-00-840-6211 INTERCHANGEABLE
Screw,machine
5962-01-225-674940221 INTERCHANGEABLE
Microcircuit,digital
Raytheon Company Div Rmd Strategic
5310-01-306-505540221 INTERCHANGEABLE
Washer,spring Tension
Bell Intl Inc
6530-01-472-3863402-21 INTERCHANGEABLE
Coupler,litter,sea-
Lifesaving Systems Llc
2910-01-539-719740221 INTERCHANGEABLE
Pump,fuel,metering and Distribut
Hdt Expeditionary Systems Inc
4810-01-549-360047693-1A11-081 INTERCHANGEABLE
Actuator,hydraulic-Pneumatic,rot
Curtiss-Wright Flow Control Corporation Dba Curtiss-Wright Flow Control Co Div Curtiss-Wright / Nu-Torque
Cross-Reference Index
Part NumberManufacturer
47693 Curtiss-Wright Flow Control Corporation Dba Curtiss-Wright Flow Control Co Div Curtiss-Wright / Nu-Torque (USA)
40221 Curtiss-Wright Flow Control Corporation Dba Curtiss-Wright Flow Control Co Div Curtiss-Wright / Nu-Torque (USA)
40221/61-999-000 PRIMARY Curtiss-Wright Flow Control Corporation Dba Curtiss-Wright Flow Control Co Div Curtiss-Wright / Nu-Torque (USA)
47693 FIND NO. 5 Curtiss-Wright Flow Control Corporation Dba Curtiss-Wright Flow Control Co Div Curtiss-Wright / Nu-Torque (USA)
Related Parts
3455-00-230-7026INTERCHANGEABLE
CUTTER,MILLING,SIDE
305-24
5930-00-273-0778INTERCHANGEABLE
SWITCH,BOX
TH3221
5330-00-291-6371INTERCHANGEABLE
SEAL,PLAIN ENCASED
162G12
5999-00-417-0413INTERCHANGEABLE
CONTACT,ELECTRICAL
40-221
5305-00-840-6211INTERCHANGEABLE
SCREW,MACHINE
5962-01-225-6749INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
40221
5310-01-306-5055INTERCHANGEABLE
WASHER,SPRING TENSION
40221
6530-01-472-3863INTERCHANGEABLE
COUPLER,LITTER,SEA-
402-21
2910-01-539-7197INTERCHANGEABLE
PUMP,FUEL,METERING AND DISTRIBUT
40221
4810-01-549-3600INTERCHANGEABLE
ACTUATOR,HYDRAULIC-PNEUMATIC,ROT
47693-1A11-081
3020-01-549-3614INTERCHANGEABLE
GEAR OPERATOR,ROTARY
40201-999-000
4810-01-551-2890INTERCHANGEABLE
ACTUATOR,HYDRAULIC-PNEUMATIC,ROT
47693-1A18-000

Frequently Asked Questions

What is NSN 6680-01-550-8105?

NSN 6680-01-550-8105 is a Indicator,sight,liquid, manufactured by Curtiss-Wright Flow Control Corporation Dba Curtiss-Wright Flow Control Co Div Curtiss-Wright / Nu-Torque, classified under FSC 6680 (No Item Name Available). Status: active.

What are the part numbers for NSN 6680-01-550-8105?

NSN 6680-01-550-8105 has 4 cross-referenced part numbers: 47693 (Curtiss-Wright Flow Control Corporation Dba Curtiss-Wright Flow Control Co Div Curtiss-Wright / Nu-Torque), 40221 (Curtiss-Wright Flow Control Corporation Dba Curtiss-Wright Flow Control Co Div Curtiss-Wright / Nu-Torque), 40221/61-999-000 (Curtiss-Wright Flow Control Corporation Dba Curtiss-Wright Flow Control Co Div Curtiss-Wright / Nu-Torque), 47693 FIND NO. 5 (Curtiss-Wright Flow Control Corporation Dba Curtiss-Wright Flow Control Co Div Curtiss-Wright / Nu-Torque).

What NSN replaces 6680-01-550-8105?

There are 12 known substitutes for 6680-01-550-8105: 3455-00-230-7026, 5930-00-273-0778, 5330-00-291-6371 and 9 more. Verify interchangeability with system specifications before substitution.

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