PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

529Indicator,sight,liquid

Lunkenheimer Co · NSN 6680-00-851-9643 · FSC 6680 · No Item Name Available
Verified by PartsTable
NSN 6680-00-851-9643 — this item is cataloged by the U.S. Government under National Stock Number 6680-00-851-9643. Primary manufacturer part number: 529.
Features
  • Indicator,sight,liquid — FSC 6680
  • Thread Direction: UNABLE TO DECODE
  • Sight Height: 3.375 INCHES NOMINAL IN
  • Furnished Data: LIQUID LEVEL
  • Thread Quantity Per Inch: UNABLE TO DECODE
  • Thread Series Designator: UNABLE TO DECODE
  • Style Designator: ANGLE PATTERN, SHIELDED
  • Nominal Thread Size: UNABLE TO DECODE
Applications
  • Applications requiring Copper Alloy construction
General Description

The Indicator,sight,liquid, cataloged under National Stock Number 6680-00-851-9643, is classified within Federal Supply Class 6680 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Lunkenheimer Co. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference 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: Cancelled.

Technical Specifications
ParameterValue
NSN6680-00-851-9643
Primary Part Number529
Item NameIndicator,sight,liquid
FSC / FSG6680 / 66 — No Item Name Available
ManufacturerLunkenheimer Co
StatusCANCELLED
Thread DirectionUNABLE TO DECODE
Sight Height3.375 INCHES NOMINAL IN
Furnished DataLIQUID LEVEL
Thread Quantity Per InchUNABLE TO DECODE
Thread Series DesignatorUNABLE TO DECODE
Style DesignatorANGLE PATTERN, SHIELDED
Nominal Thread SizeUNABLE TO DECODE
End Connection TypeUNABLE TO DECODE
Data Furnishing MethodCLEAR WINDOW
MaterialCOPPER ALLOY
Media for Which DesignedOIL
Reference Number Differentiating CharacteristicsAHNC,ASPP,ACSU,THDS,ASPQ,AJFY,AENV,AECS,ABKG,AHNX
Nominal Pipe Size for Which DesignedUNABLE TO DECODE
Width Across Flats0.500 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
2930-00-008-73982960799 INTERCHANGEABLE
Radiator,engine Coolant
Chrysler Realty Company Llc Dba Daimler Chrysler
3110-00-100-0271529 INTERCHANGEABLE
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The Timken Corporation
5310-00-167-13660422-014 INTERCHANGEABLE
Nut,plain,hexagon
Lockheed Martin Corporation Div Rms - Mitchel Field
3455-00-225-9194 INTERCHANGEABLE
Blade,hole Saw
6515-00-379-4100 INTERCHANGEABLE
Syringe,irrigating
5120-00-624-8065 INTERCHANGEABLE
Pliers,slip Joint
2930-01-003-5471 INTERCHANGEABLE
Radiator,engine Coolant
7510-01-024-94021136653 INTERCHANGEABLE
Ribbon,inking
International Business Machines Corp Parts Order Center Dept E - 54
5962-01-028-8017G390532-1 INTERCHANGEABLE
Microcircuit,linear
L3harris Technologies, Inc Div Space & Airborne Systems
5820-01-062-6203 INTERCHANGEABLE
Equalizer,room,acti
Cross-Reference Index
Part NumberManufacturer
529 Lunkenheimer Co (USA)
Related Parts
2930-00-008-7398INTERCHANGEABLE
RADIATOR,ENGINE COOLANT
2960799
3110-00-100-0271INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
529
5310-00-167-1366INTERCHANGEABLE
NUT,PLAIN,HEXAGON
0422-014
3455-00-225-9194INTERCHANGEABLE
BLADE,HOLE SAW
6515-00-379-4100INTERCHANGEABLE
SYRINGE,IRRIGATING
5120-00-624-8065INTERCHANGEABLE
PLIERS,SLIP JOINT
2930-01-003-5471INTERCHANGEABLE
RADIATOR,ENGINE COOLANT
7510-01-024-9402INTERCHANGEABLE
RIBBON,INKING
1136653
5962-01-028-8017INTERCHANGEABLE
MICROCIRCUIT,LINEAR
G390532-1
5820-01-062-6203INTERCHANGEABLE
EQUALIZER,ROOM,ACTI
5940-01-159-8555INTERCHANGEABLE
TERMINAL,LUG
529
3010-01-188-5973INTERCHANGEABLE
GEARCASE-MOTOR

Frequently Asked Questions

What is NSN 6680-00-851-9643?

NSN 6680-00-851-9643 is a Indicator,sight,liquid, manufactured by Lunkenheimer Co, classified under FSC 6680 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6680-00-851-9643?

NSN 6680-00-851-9643 has 1 cross-referenced part number: 529 (Lunkenheimer Co).

What NSN replaces 6680-00-851-9643?

There are 12 known substitutes for 6680-00-851-9643: 2930-00-008-7398, 3110-00-100-0271, 5310-00-167-1366 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 529?

Key specifications for 529: Thread Direction: UNABLE TO DECODE; Sight Height: 3.375 INCHES NOMINAL IN; Furnished Data: LIQUID LEVEL; Thread Quantity Per Inch: UNABLE TO DECODE. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6680-00-851-9643 still in active supply?

NSN 6680-00-851-9643 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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