PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

S-56KIndicator,sight,liquid

Eaton Aerospace Llc Div Fluid and Electrical Distribution Division · NSN 6680-00-845-1412 · FSC 6680 · No Item Name Available
Verified by PartsTable
NSN 6680-00-845-1412 — this item is cataloged by the U.S. Government under National Stock Number 6680-00-845-1412. Primary manufacturer part number: S-56K.
Features
  • Indicator,sight,liquid — FSC 6680
  • Thread Direction: UNABLE TO DECODE
  • Thread Series Designator: UNABLE TO DECODE
  • Media for Which Designed: OIL
  • Style Designator: BULLS EYE
  • Furnished Data: LIQUID LEVEL
  • Surface Treatment: ANODIZE
  • Material: ALUMINUM ALLOY
Applications
  • Applications requiring Aluminum Alloy construction
General Description

The Indicator,sight,liquid, cataloged under National Stock Number 6680-00-845-1412, is classified within Federal Supply Class 6680 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Eaton Aerospace Llc Div Fluid and Electrical Distribution Division. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6680-00-845-1412
Primary Part NumberS-56K
Item NameIndicator,sight,liquid
FSC / FSG6680 / 66 — No Item Name Available
ManufacturerEaton Aerospace Llc Div Fluid and Electrical Distribution Division
StatusACTIVE
Thread DirectionUNABLE TO DECODE
Thread Series DesignatorUNABLE TO DECODE
Media for Which DesignedOIL
Style DesignatorBULLS EYE
Furnished DataLIQUID LEVEL
Surface TreatmentANODIZE
MaterialALUMINUM ALLOY
End Connection TypeUNABLE TO DECODE
Data Furnishing MethodCLEAR WINDOW
Features ProvidedREFLECTOR
Nominal Thread SizeUNABLE TO DECODE
Thread Quantity Per InchUNABLE TO DECODE
Width Across Flats2.500 INCHES NOMINAL IN
Thread ClassUNABLE TO DECODE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
3455-00-187-2637 INTERCHANGEABLE
Blade,hole Saw
3416-00-235-0520 INTERCHANGEABLE
Lathe,engine
3455-00-517-5970716-120217 INTERCHANGEABLE
Cutter,milling,end
Doall Baltimore Company
5340-00-584-6469S56 INTERCHANGEABLE
Plunger,quick Release
Hutchinson Aerospace & Industry, Inc. Dba Vlier Div Vlier
5305-00-795-7872 INTERCHANGEABLE
Screw
Cross-Reference Index
Part NumberManufacturer
S-56 Eaton Aerospace Llc Div Fluid and Electrical Distribution Division (USA)
S-56K PRIMARY Eaton Aerospace Llc Div Fluid and Electrical Distribution Division (USA)
Related Parts
3455-00-187-2637INTERCHANGEABLE
BLADE,HOLE SAW
3416-00-235-0520INTERCHANGEABLE
LATHE,ENGINE
3455-00-517-5970INTERCHANGEABLE
CUTTER,MILLING,END
716-120217
5340-00-584-6469INTERCHANGEABLE
PLUNGER,QUICK RELEASE
S56
5305-00-795-7872INTERCHANGEABLE
SCREW

Frequently Asked Questions

What is NSN 6680-00-845-1412?

NSN 6680-00-845-1412 is a Indicator,sight,liquid, manufactured by Eaton Aerospace Llc Div Fluid and Electrical Distribution Division, classified under FSC 6680 (No Item Name Available). Status: active.

What are the part numbers for NSN 6680-00-845-1412?

NSN 6680-00-845-1412 has 2 cross-referenced part numbers: S-56 (Eaton Aerospace Llc Div Fluid and Electrical Distribution Division), S-56K (Eaton Aerospace Llc Div Fluid and Electrical Distribution Division).

What NSN replaces 6680-00-845-1412?

There are 5 known substitutes for 6680-00-845-1412: 3455-00-187-2637, 3416-00-235-0520, 3455-00-517-5970 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of S-56K?

Key specifications for S-56K: Thread Direction: UNABLE TO DECODE; Thread Series Designator: UNABLE TO DECODE; Media for Which Designed: OIL; Style Designator: BULLS EYE. 15 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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