PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

PT-395-045Window,observation

Johnston Boiler Company · NSN 9340-01-337-6474 · FSC 9340 · No Item Name Available
Verified by PartsTable
NSN 9340-01-337-6474 — this item is cataloged by the U.S. Government under National Stock Number 9340-01-337-6474. Primary manufacturer part number: PT-395-045.
Features
  • Window,observation — FSC 9340
  • Overall Thickness: 0.187 INCHES NOMINAL IN
  • Material Transparency: CLEAR
  • Material: GLASS
  • Style Designator: CIRCULAR
  • Overall Diameter: 2.125 INCHES NOMINAL IN
  • 2 verified cross-references
  • Primary manufacturer: Johnston Boiler Company
Applications
  • Applications requiring Glass construction
General Description

The Window,observation, cataloged under National Stock Number 9340-01-337-6474, is classified within Federal Supply Class 9340 (No Item Name Available) of the Nonmetallic Fabricated Materials group. The primary manufacturer of record is Johnston Boiler Company. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN9340-01-337-6474
Primary Part NumberPT-395-045
Item NameWindow,observation
FSC / FSG9340 / 93 — No Item Name Available
ManufacturerJohnston Boiler Company
StatusACTIVE
Overall Thickness0.187 INCHES NOMINAL IN
Material TransparencyCLEAR
MaterialGLASS
Style DesignatorCIRCULAR
Overall Diameter2.125 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5895-00-401-0720 INTERCHANGEABLE
Test Set,countermea
1680-00-761-9345 INTERCHANGEABLE
Sphere,weld Assembl
5950-00-951-2108668-0407-000 INTERCHANGEABLE
Reactor
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
5950-01-019-5294986071-1 INTERCHANGEABLE
Reactor
Raytheon Company Dba Raytheon
6145-01-134-0845 INTERCHANGEABLE
Wire,electrical
4730-01-412-958512448734-3 INTERCHANGEABLE
Elbow,tube
U S Army Tank Automotive Command Amsta-Im-Mm
Cross-Reference Index
Part NumberManufacturer
PT-395-045 Johnston Boiler Company (USA)
13088 Johnston Boiler Company (USA)
Related Parts
5895-00-401-0720INTERCHANGEABLE
TEST SET,COUNTERMEA
1680-00-761-9345INTERCHANGEABLE
SPHERE,WELD ASSEMBL
5950-00-951-2108INTERCHANGEABLE
REACTOR
668-0407-000
5950-01-019-5294INTERCHANGEABLE
REACTOR
986071-1
6145-01-134-0845INTERCHANGEABLE
WIRE,ELECTRICAL
4730-01-412-9585INTERCHANGEABLE
ELBOW,TUBE
12448734-3

Frequently Asked Questions

What is NSN 9340-01-337-6474?

NSN 9340-01-337-6474 is a Window,observation, manufactured by Johnston Boiler Company, classified under FSC 9340 (No Item Name Available). Status: active.

What are the part numbers for NSN 9340-01-337-6474?

NSN 9340-01-337-6474 has 2 cross-referenced part numbers: PT-395-045 (Johnston Boiler Company), 13088 (Johnston Boiler Company).

What NSN replaces 9340-01-337-6474?

There are 6 known substitutes for 9340-01-337-6474: 5895-00-401-0720, 1680-00-761-9345, 5950-00-951-2108 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of PT-395-045?

Key specifications for PT-395-045: Overall Thickness: 0.187 INCHES NOMINAL IN; Material Transparency: CLEAR; Material: GLASS; Style Designator: CIRCULAR. 6 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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