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NSN 6680-01-620-3501Government record, cited
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Compensator, Liquid Quantity Gage6680-01-620-3501

NSN 6680-01-620-3501 · NIIN 016203501 · Part number 020-135-103
Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division · FSC 6680 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments · FSG 66 — Instruments and Laboratory Equipment · CAGE 26055
Government record, cited
NSN 6680-01-620-3501 — this item is cataloged by the U.S. Government under National Stock Number 6680-01-620-3501. Manufacturer of record part number: 020-135-103.
Also searched as  6680-01-620-3501 · 6680016203501 · NIIN 016203501 · 01-620-3501 · FSC 6680 Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments · CAGE 26055 · 020-135-103 · 201236986 · 201236986-11 · FG120L3-FAC
Nearby stock numbers  ·
Features
  • Compensator,liquid Quantity Gage — FSC 6680
  • 2 manufacturer part numbers on file
  • Manufacturer of record: Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division
Identification
  • NSN: 6680-01-620-3501
  • NIIN: 016203501
  • FSC: 6680 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments
  • FSG: 66 — Instruments and Laboratory Equipment
  • Primary part number: 020-135-103
  • Manufacturer: Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division
General Description

The Compensator,liquid Quantity Gage, cataloged under National Stock Number 6680-01-620-3501, is classified within Federal Supply Class 6680 (Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 12 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6680-01-620-3501
Primary Part Number020-135-103
Item NameCompensator,liquid Quantity Gage
FSC / FSG6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments
ManufacturerParker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 12
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
6680-01-620-3505020-135-108 POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division
6680-01-620-3509020-135-102 POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division
6680-01-620-3525020-135-111 POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division
6680-01-620-3533020-135-105 POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division
6680-01-620-3717020-135-107 POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division
6680-01-620-3719020-135-110 POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division
6680-01-620-3722020-135-104 POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division
6680-01-620-3725020-135-106 POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division
6680-01-620-4088021-135-108 POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division
6680-01-620-4216021-135-105 POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division
Cross-Reference Index
Part NumberManufacturer
FG120L3-FAC Firstmark Aerospace Corp (USA)
020-135-103 PRIMARY Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division (USA)
Reference documents
ReferenceMeaning
020-135-103 5/1 Secondary reference
Parker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations
201236986 D/9 Drawing number reference only
U.S. Government activity
201236986-11 1/2 Source control — Government-approved source
U.S. Government activity
Related Parts
6680-01-620-3505POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
020-135-108
6680-01-620-3509POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
020-135-102
6680-01-620-3525POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
020-135-111
6680-01-620-3533POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
020-135-105
6680-01-620-3717POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
020-135-107
6680-01-620-3719POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
020-135-110
6680-01-620-3722POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
020-135-104
6680-01-620-3725POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
020-135-106
6680-01-620-4088POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
021-135-108
6680-01-620-4216POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
021-135-105
6680-01-620-4218POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
021-135-104
6680-01-620-4222POSSIBLE MATCH
COMPENSATOR,LIQUID QUANTITY GAGE
021-135-143

Frequently Asked Questions

What is NSN 6680-01-620-3501?

NSN 6680-01-620-3501 is a Compensator,liquid Quantity Gage, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.

What part numbers are listed for NSN 6680-01-620-3501?

NSN 6680-01-620-3501 has 2 manufacturer part numbers on file: FG120L3-FAC (Firstmark Aerospace Corp), 020-135-103 (Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division).

What NSN replaces 6680-01-620-3501?

12 possible matches (shared part number, not a government interchangeability claim): 6680-01-620-3505, 6680-01-620-3509, 6680-01-620-3525. Verify interchangeability with system specifications before substitution.

What are the specifications of 020-135-103?

Key specifications for 020-135-103: Part Name Assigned by Controlling Agency: LIQUID QTY GAGE TANK UNIT; End Item Identification: KC-135 ACFT. 0 specifications are documented in the U.S. Government catalog.

Is NSN 6680-01-620-3501 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

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✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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