PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

W53Indicator,sight,liquid

Eaton Aerospace Llc Div Fluid and Electrical Distribution Division · NSN 6680-00-885-8721 · FSC 6680 · No Item Name Available
Verified by PartsTable
NSN 6680-00-885-8721 — this item is cataloged by the U.S. Government under National Stock Number 6680-00-885-8721. Primary manufacturer part number: W53.
Features
  • Indicator,sight,liquid — FSC 6680
  • Style Designator: BULLS EYE
  • Width Across Flats: 1.000 INCHES NOMINAL IN
  • Data Furnishing Method: CLEAR WINDOW
  • Thread Direction: UNABLE TO DECODE
  • Sight Diameter: 0.625 INCHES NOMINAL IN
  • Nominal Pipe Size for Which Designed: UNABLE TO DECODE
  • Media for Which Designed: OIL
Applications
  • Applications requiring Aluminum Alloy construction
General Description

The Indicator,sight,liquid, cataloged under National Stock Number 6680-00-885-8721, 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 3 commercial cross-references from 2 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
NSN6680-00-885-8721
Primary Part NumberW53
Item NameIndicator,sight,liquid
FSC / FSG6680 / 66 — No Item Name Available
ManufacturerEaton Aerospace Llc Div Fluid and Electrical Distribution Division
StatusACTIVE
Style DesignatorBULLS EYE
Width Across Flats1.000 INCHES NOMINAL IN
Data Furnishing MethodCLEAR WINDOW
Thread DirectionUNABLE TO DECODE
Sight Diameter0.625 INCHES NOMINAL IN
Nominal Pipe Size for Which DesignedUNABLE TO DECODE
Media for Which DesignedOIL
Nominal Thread SizeUNABLE TO DECODE
Thread ClassUNABLE TO DECODE
MaterialALUMINUM ALLOY
End Connection TypeUNABLE TO DECODE
Thread Series DesignatorUNABLE TO DECODE
Furnished DataLIQUID LEVEL
Surface TreatmentANODIZE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5325-00-457-6959 INTERCHANGEABLE
Ring,retaining
9905-00-721-8801W5-3B INTERCHANGEABLE
Sign,traffic
Federal Prison Industries, Inc - Ebg
5999-00-893-9129W53 INTERCHANGEABLE
Heater,thermal Release
Ward Leonard Ct Llc
4931-01-208-570712618149-15 INTERCHANGEABLE
Heater
Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate
Cross-Reference Index
Part NumberManufacturer
W53 PRIMARY Eaton Aerospace Llc Div Fluid and Electrical Distribution Division (USA)
53 Eaton Aerospace Llc Div Fluid and Electrical Distribution Division (USA)
11640467 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
Related Parts
5325-00-457-6959INTERCHANGEABLE
RING,RETAINING
9905-00-721-8801INTERCHANGEABLE
SIGN,TRAFFIC
W5-3B
5999-00-893-9129INTERCHANGEABLE
HEATER,THERMAL RELEASE
W53
4931-01-208-5707INTERCHANGEABLE
HEATER
12618149-15

Frequently Asked Questions

What is NSN 6680-00-885-8721?

NSN 6680-00-885-8721 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 6680-00-885-8721?

NSN 6680-00-885-8721 has 3 cross-referenced part numbers: W53 (Eaton Aerospace Llc Div Fluid and Electrical Distribution Division), 53 (Eaton Aerospace Llc Div Fluid and Electrical Distribution Division), 11640467 (U S Army Tank Automotive Command Amsta-Im-Mm).

What NSN replaces 6680-00-885-8721?

There are 4 known substitutes for 6680-00-885-8721: 5325-00-457-6959, 9905-00-721-8801, 5999-00-893-9129 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of W53?

Key specifications for W53: Style Designator: BULLS EYE; Width Across Flats: 1.000 INCHES NOMINAL IN; Data Furnishing Method: CLEAR WINDOW; Thread Direction: UNABLE TO DECODE. 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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