PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

420L 37IN CTR TO CTRIndicator,sight,liquid

Ernst, John C & Co, Inc. · NSN 6680-01-444-4438 · FSC 6680 · No Item Name Available
Verified by PartsTable
NSN 6680-01-444-4438 — this item is cataloged by the U.S. Government under National Stock Number 6680-01-444-4438. Primary manufacturer part number: 420L 37IN CTR TO CTR.
Features
  • Indicator,sight,liquid — FSC 6680
  • Material: COPPER ALLOY
  • 3 verified cross-references
  • Primary manufacturer: Ernst, John C & Co, Inc.
Applications
  • Applications requiring Copper Alloy construction
General Description

The Indicator,sight,liquid, cataloged under National Stock Number 6680-01-444-4438, is classified within Federal Supply Class 6680 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Ernst, John C & Co, Inc.. Government technical data includes 1 verified specification, 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6680-01-444-4438
Primary Part Number420L 37IN CTR TO CTR
Item NameIndicator,sight,liquid
FSC / FSG6680 / 66 — No Item Name Available
ManufacturerErnst, John C & Co, Inc.
StatusACTIVE
MaterialCOPPER ALLOY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
2915-00-202-576942005 INTERCHANGEABLE
Filter,fluid
Parker Hannifin Corporation Div Aerospace Group Headquarters
5999-00-383-2112 INTERCHANGEABLE
Heater,thermal Release
2910-00-651-8550F6X17T2 INTERCHANGEABLE
Filter Element,fluid
Zenith Fuel Systems Llc
5950-00-967-7725722898-28 INTERCHANGEABLE
Transformer,power
Raytheon Company Div Rmd Strategic
6650-01-080-418412266705 INTERCHANGEABLE
Lens,optical Instrument
U S Army Tank Automotive Command Amsta-Im-Mm
5935-01-208-0829 INTERCHANGEABLE
Connector,plug,electrical
4920-01-303-087242005 INTERCHANGEABLE
Test Program Set
Textron Systems Corporation Dba Textron Systems Corp
5360-01-308-809742005 INTERCHANGEABLE
Spring,helical,compression
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
5310-01-369-9454N42005 INTERCHANGEABLE
Washer,flat
Leslie Controls, Inc. Dba Leslie Controls Inc
5895-01-392-897642005 INTERCHANGEABLE
Modem,communications
Motorola/codex Corp Sub of Motorola Inc
Cross-Reference Index
Part NumberManufacturer
420L 37IN CTR TO CTR PRIMARY Ernst, John C & Co, Inc. (USA)
E42005 Ernst, John C & Co, Inc. (USA)
420-05 Kampi Components Co Inc (USA)
Related Parts
2915-00-202-5769INTERCHANGEABLE
FILTER,FLUID
42005
5999-00-383-2112INTERCHANGEABLE
HEATER,THERMAL RELEASE
2910-00-651-8550INTERCHANGEABLE
FILTER ELEMENT,FLUID
F6X17T2
5950-00-967-7725INTERCHANGEABLE
TRANSFORMER,POWER
722898-28
6650-01-080-4184INTERCHANGEABLE
LENS,OPTICAL INSTRUMENT
12266705
5935-01-208-0829INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
4920-01-303-0872INTERCHANGEABLE
TEST PROGRAM SET
42005
5360-01-308-8097INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
42005
5310-01-369-9454INTERCHANGEABLE
WASHER,FLAT
N42005
5895-01-392-8976INTERCHANGEABLE
MODEM,COMMUNICATIONS
42005
6680-01-444-4479INTERCHANGEABLE
INDICATOR,SIGHT,LIQUID
420L 34-1/2 CTR TO CTR
6680-01-444-5037INTERCHANGEABLE
INDICATOR,SIGHT,LIQUID
420L 33IN CTR TO CTR

Frequently Asked Questions

What is NSN 6680-01-444-4438?

NSN 6680-01-444-4438 is a Indicator,sight,liquid, manufactured by Ernst, John C & Co, Inc., classified under FSC 6680 (No Item Name Available). Status: active.

What are the part numbers for NSN 6680-01-444-4438?

NSN 6680-01-444-4438 has 3 cross-referenced part numbers: 420L 37IN CTR TO CTR (Ernst, John C & Co, Inc.), E42005 (Ernst, John C & Co, Inc.), 420-05 (Kampi Components Co Inc).

What NSN replaces 6680-01-444-4438?

There are 12 known substitutes for 6680-01-444-4438: 2915-00-202-5769, 5999-00-383-2112, 2910-00-651-8550 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 420L 37IN CTR TO CTR?

Key specifications for 420L 37IN CTR TO CTR: Material: COPPER ALLOY; Special Features: TYPE 1 WITH BRAZED FLANGES;3/4IN. NPT;NON AUTOMATIC W/O BALL CHECK IN. 2 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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