PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A-2521Window,observation

Howell Laboratories Inc Dba Howell Laboratories Inc · NSN 9330-01-083-5882 · FSC 9330 · No Item Name Available
Verified by PartsTable
NSN 9330-01-083-5882 — this item is cataloged by the U.S. Government under National Stock Number 9330-01-083-5882. Primary manufacturer part number: A-2521.
Features
  • Window,observation — FSC 9330
  • Overall Diameter: 1.148 INCHES NOMINAL IN
  • Material Transparency: CLEAR
  • Edge Type: FLAT FINISH
  • Surface Finish: POLISHED
  • Material: PLASTIC METHYL METHACRYLATE
  • Style Designator: CIRCULAR
  • Minimum Tensile Strength: 8000 POUNDS PER SQUARE INCH LBS
Applications
  • Applications requiring Plastic Methyl Methacrylate construction
General Description

The Window,observation, cataloged under National Stock Number 9330-01-083-5882, is classified within Federal Supply Class 9330 (No Item Name Available) of the Nonmetallic Fabricated Materials group. The primary manufacturer of record is Howell Laboratories Inc Dba Howell Laboratories Inc. Government technical data includes 9 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN9330-01-083-5882
Primary Part NumberA-2521
Item NameWindow,observation
FSC / FSG9330 / 93 — No Item Name Available
ManufacturerHowell Laboratories Inc Dba Howell Laboratories Inc
StatusACTIVE
Overall Diameter1.148 INCHES NOMINAL IN
Material TransparencyCLEAR
Edge TypeFLAT FINISH
Surface FinishPOLISHED
MaterialPLASTIC METHYL METHACRYLATE
Style DesignatorCIRCULAR
Minimum Tensile Strength8000 POUNDS PER SQUARE INCH LBS
Overall Thickness1.062 INCHES NOMINAL IN
Ply Quantity1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
9330-00-110-2797A2521 INTERCHANGEABLE
Window Assembly Obs
Canberra Industries Inc.
2920-00-374-2534480190 INTERCHANGEABLE
Drive,engine,electrical Starter
Purolator Products Co Div Motor Components, Llc
5962-00-689-8941930026-1B INTERCHANGEABLE
Microcircuit,linear
Raytheon Company Dba Raytheon
Cross-Reference Index
Part NumberManufacturer
A-2521 PRIMARY Howell Laboratories Inc Dba Howell Laboratories Inc (USA)
2167 ITEM 5 Howell Laboratories Inc Dba Howell Laboratories Inc (USA)
Related Parts
9330-00-110-2797INTERCHANGEABLE
WINDOW ASSEMBLY OBS
A2521
2920-00-374-2534INTERCHANGEABLE
DRIVE,ENGINE,ELECTRICAL STARTER
480190
5962-00-689-8941INTERCHANGEABLE
MICROCIRCUIT,LINEAR
930026-1B

Frequently Asked Questions

What is NSN 9330-01-083-5882?

NSN 9330-01-083-5882 is a Window,observation, manufactured by Howell Laboratories Inc Dba Howell Laboratories Inc, classified under FSC 9330 (No Item Name Available). Status: active.

What are the part numbers for NSN 9330-01-083-5882?

NSN 9330-01-083-5882 has 2 cross-referenced part numbers: A-2521 (Howell Laboratories Inc Dba Howell Laboratories Inc), 2167 ITEM 5 (Howell Laboratories Inc Dba Howell Laboratories Inc).

What NSN replaces 9330-01-083-5882?

There are 3 known substitutes for 9330-01-083-5882: 9330-00-110-2797, 2920-00-374-2534, 5962-00-689-8941. Verify interchangeability with system specifications before substitution.

What are the specifications of A-2521?

Key specifications for A-2521: Overall Diameter: 1.148 INCHES NOMINAL IN; Material Transparency: CLEAR; Edge Type: FLAT FINISH; Surface Finish: POLISHED. 9 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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