PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21020Window,observation

Compass Water Solutions, Inc · NSN 9340-01-304-9889 · FSC 9340 · No Item Name Available
Verified by PartsTable
NSN 9340-01-304-9889 — this item is cataloged by the U.S. Government under National Stock Number 9340-01-304-9889. Primary manufacturer part number: 21020.
Features
  • Window,observation — FSC 9340
  • Material: GLASS
  • Material Transparency: CLEAR
  • 2 verified cross-references
  • Primary manufacturer: Compass Water Solutions, Inc
Applications
  • Applications requiring Glass construction
General Description

The Window,observation, cataloged under National Stock Number 9340-01-304-9889, is classified within Federal Supply Class 9340 (No Item Name Available) of the Nonmetallic Fabricated Materials group. The primary manufacturer of record is Compass Water Solutions, Inc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 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
NSN9340-01-304-9889
Primary Part Number21020
Item NameWindow,observation
FSC / FSG9340 / 93 — No Item Name Available
ManufacturerCompass Water Solutions, Inc
StatusACTIVE
MaterialGLASS
Material TransparencyCLEAR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5120-00-061-854421020 INTERCHANGEABLE
Hammer,hand
Nupla Corporation
4730-00-278-2523 INTERCHANGEABLE
Clamp,hose
4820-00-603-869621020 INTERCHANGEABLE
Valve,check
Mission Systems Orchard Park Inc
5985-00-633-0231 INTERCHANGEABLE
Attenuator,fixed
4810-00-688-993921020 INTERCHANGEABLE
Valve,solenoid
Rocker Solenoid Co Dba Rocker Solenoid Co
5905-00-702-0523 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
5935-00-847-9683952141-1 INTERCHANGEABLE
Adapter,connector
Raytheon Company Dba Raytheon Co
4820-01-142-5193 INTERCHANGEABLE
Valve,operator
5365-01-240-06082-1020 INTERCHANGEABLE
Ring,externally Threaded
Malabar
5998-01-295-600321014 INTERCHANGEABLE
Circuit Card Assembly
Giga-Tronics Incorporated Dba Giga-Tronics
Cross-Reference Index
Part NumberManufacturer
21020 Separation & Recovery Systems Inc (USA)
21020 PRIMARY Compass Water Solutions, Inc (USA)
Related Parts
5120-00-061-8544INTERCHANGEABLE
HAMMER,HAND
21020
4730-00-278-2523INTERCHANGEABLE
CLAMP,HOSE
4820-00-603-8696INTERCHANGEABLE
VALVE,CHECK
21020
5985-00-633-0231INTERCHANGEABLE
ATTENUATOR,FIXED
4810-00-688-9939INTERCHANGEABLE
VALVE,SOLENOID
21020
5905-00-702-0523INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
5935-00-847-9683INTERCHANGEABLE
ADAPTER,CONNECTOR
952141-1
4820-01-142-5193INTERCHANGEABLE
VALVE,OPERATOR
5365-01-240-0608INTERCHANGEABLE
RING,EXTERNALLY THREADED
2-1020
5998-01-295-6003INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
21014
5970-01-298-3310INTERCHANGEABLE
APEX INSULATOR ASSEMBLY
21020
4720-01-329-8602INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
280003

Frequently Asked Questions

What is NSN 9340-01-304-9889?

NSN 9340-01-304-9889 is a Window,observation, manufactured by Compass Water Solutions, Inc, classified under FSC 9340 (No Item Name Available). Status: active.

What are the part numbers for NSN 9340-01-304-9889?

NSN 9340-01-304-9889 has 2 cross-referenced part numbers: 21020 (Separation & Recovery Systems Inc), 21020 (Compass Water Solutions, Inc).

What NSN replaces 9340-01-304-9889?

There are 12 known substitutes for 9340-01-304-9889: 5120-00-061-8544, 4730-00-278-2523, 4820-00-603-8696 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21020?

Key specifications for 21020: Overall Length: 15.0 MILLIMETERS NOMINAL MM; Overall Width: 11.0 MILLIMETERS NOMINAL MM; Material: GLASS; Material Transparency: CLEAR. 4 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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