PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20699-1Window,observation

Defense & Development Enterprises Llc · NSN 9340-00-811-3289 · FSC 9340 · No Item Name Available
Verified by PartsTable
NSN 9340-00-811-3289 — this item is cataloged by the U.S. Government under National Stock Number 9340-00-811-3289. Primary manufacturer part number: 20699-1.
Features
  • Window,observation — FSC 9340
  • Material: GLASS
  • Edge Type: FLAT FINISH
  • Style Designator: CIRCULAR
  • Overall Thickness: 0.250 INCHES NOMINAL IN
  • Ply Quantity: 1
  • Material Transparency: CLEAR
  • Overall Diameter: 1.000 INCHES NOMINAL IN
Applications
  • Applications requiring Glass construction
General Description

The Window,observation, cataloged under National Stock Number 9340-00-811-3289, is classified within Federal Supply Class 9340 (No Item Name Available) of the Nonmetallic Fabricated Materials group. The primary manufacturer of record is Defense & Development Enterprises Llc. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN9340-00-811-3289
Primary Part Number20699-1
Item NameWindow,observation
FSC / FSG9340 / 93 — No Item Name Available
ManufacturerDefense & Development Enterprises Llc
StatusCANCELLED
MaterialGLASS
Edge TypeFLAT FINISH
Style DesignatorCIRCULAR
Overall Thickness0.250 INCHES NOMINAL IN
Ply Quantity1
Material TransparencyCLEAR
Overall Diameter1.000 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 3
5325-01-269-9341F39010275 INTERCHANGEABLE
Ring,retaining
Funk Mfg Co Sub of Deere and Co
6625-01-279-2602206991 INTERCHANGEABLE
Analyzer,electrical Pulse
Cadillac Gage Textron Inc.
3950-01-429-2217AD-5502 INTERCHANGEABLE
Snubber,mechanical
Anchor/darling Enterprises Inc
Cross-Reference Index
Part NumberManufacturer
20699-1 Defense & Development Enterprises Llc (USA)
20699-1 Triumph Thermal Systems - Maryland, Inc. (USA)
20699-1 Hiller Aircraft Corporation (USA)
Related Parts
5325-01-269-9341INTERCHANGEABLE
RING,RETAINING
F39010275
6625-01-279-2602INTERCHANGEABLE
ANALYZER,ELECTRICAL PULSE
206991
3950-01-429-2217INTERCHANGEABLE
SNUBBER,MECHANICAL
AD-5502

Frequently Asked Questions

What is NSN 9340-00-811-3289?

NSN 9340-00-811-3289 is a Window,observation, manufactured by Defense & Development Enterprises Llc, classified under FSC 9340 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 9340-00-811-3289?

NSN 9340-00-811-3289 has 3 cross-referenced part numbers: 20699-1 (Defense & Development Enterprises Llc), 20699-1 (Triumph Thermal Systems - Maryland, Inc.), 20699-1 (Hiller Aircraft Corporation).

What NSN replaces 9340-00-811-3289?

There are 3 known substitutes for 9340-00-811-3289: 5325-01-269-9341, 6625-01-279-2602, 3950-01-429-2217. Verify interchangeability with system specifications before substitution.

What are the specifications of 20699-1?

Key specifications for 20699-1: Material: GLASS; Edge Type: FLAT FINISH; Style Designator: CIRCULAR; Special Features: NOT TEMPERED. 8 total characteristics are documented in the Federal Logistics Information System.

Is NSN 9340-00-811-3289 still in active supply?

NSN 9340-00-811-3289 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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