NSN 6680-01-643-6379 · NIIN 016436379 · Part number L-20-D
Csh Inc Dba Csh · FSC 6680 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments · FSG 66 — Instruments and Laboratory Equipment · CAGE 53AK1
Government record, cited
NSN 6680-01-643-6379 — this item is cataloged by the U.S. Government under National Stock Number 6680-01-643-6379. Manufacturer of record part number: L-20-D.
Also searched as6680-01-643-6379 ·
6680016436379 ·
NIIN 016436379 ·
01-643-6379 ·
FSC 6680 Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments · CAGE 53AK1 · L-20-D · 51445K921
Voltage Rating at Maximum Rated Current: 120.0 VOLTS
Maximum Current Rating: 15.00 AMPERES NOMINAL LOAD
Float Effective Travel: 3.25 INCHES NOMINAL IN
Float Quantity: 1
Liquid Type for Which Designed: WATER
Identification
NSN: 6680-01-643-6379
NIIN: 016436379
FSC: 6680 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments
FSG: 66 — Instruments and Laboratory Equipment
Primary part number: L-20-D
Manufacturer: Csh Inc Dba Csh
General Description
The Switch,liquid Level, cataloged under National Stock Number 6680-01-643-6379, 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 Csh Inc Dba Csh. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
6680-01-643-6379
Primary Part Number
L-20-D
Item Name
Switch,liquid Level
FSC / FSG
6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments
Manufacturer
Csh Inc Dba Csh
Status
ACTIVE
Power Cable Length
234.0 INCHES NOMINAL IN
Overall Diameter
3.5 INCHES NOMINAL IN
Voltage Rating at Maximum Rated Current
120.0 VOLTS
Maximum Current Rating
15.00 AMPERES NOMINAL LOAD
Float Effective Travel
3.25 INCHES NOMINAL IN
Float Quantity
1
Liquid Type for Which Designed
WATER
Operating Temp Rating
33.0 FAHRENHEIT MINIMUM AND 140.0 FAHRENHEIT MAXIMUM DEGF
Other items in FSC 6680 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
6680-00-000-0189
TRANSMITTER,LIQUID QUANTITY
6680-00-001-1478
GAGE ROD-CAP,LIQUID LEVEL
6680-00-001-1502
6680-00-001-1502 · Item name not on file
6680-00-001-1506
6680-00-001-1506 · Item name not on file
6680-00-001-1511
GAGE ROD,LIQUID LEVEL
6680-00-001-3672
COUNTER,ROTATING
6680-00-001-3675
INDICATOR,SIGHT,LIQUID
6680-00-001-4170
COUNTER,ROTATING
Frequently Asked Questions
What is NSN 6680-01-643-6379?
NSN 6680-01-643-6379 is a Switch,liquid Level, manufactured by Csh Inc Dba Csh, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
What part numbers are listed for NSN 6680-01-643-6379?
NSN 6680-01-643-6379 has 2 manufacturer part numbers on file: L-20-D (Csh Inc Dba Csh), 51445K921 (Mcmaster-Carr Supply Co).
What are the specifications of L-20-D?
Key specifications for L-20-D: Power Cable Length: 234.0 INCHES NOMINAL IN; Overall Diameter: 3.5 INCHES NOMINAL IN; Voltage Rating at Maximum Rated Current: 120.0 VOLTS; Maximum Current Rating: 15.00 AMPERES NOMINAL LOAD. 9 specifications are documented in the U.S. Government catalog.
Is NSN 6680-01-643-6379 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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.