PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B311-284Window,dial

Northrop Grumman Systems Corp Dba Northrop Grumman Systems Corp · NSN 5355-00-668-7896 · FSC 5355 · No Item Name Available
Verified by PartsTable
NSN 5355-00-668-7896 — this item is cataloged by the U.S. Government under National Stock Number 5355-00-668-7896. Primary manufacturer part number: B311-284.
Features
  • Window,dial — FSC 5355
  • Material Thickness: 0.406 INCHES NOMINAL IN
  • Outside Diameter: 7.375 INCHES NOMINAL IN
  • Style Designator: ROUND
  • Material: GLASS
  • 3 verified cross-references
  • Primary manufacturer: Northrop Grumman Systems Corp Dba Northrop Grumman Systems Corp
Applications
  • Applications requiring Glass construction
General Description

The Window,dial, cataloged under National Stock Number 5355-00-668-7896, is classified within Federal Supply Class 5355 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Northrop Grumman Systems Corp Dba Northrop Grumman Systems Corp. Government technical data includes 4 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5355-00-668-7896
Primary Part NumberB311-284
Item NameWindow,dial
FSC / FSG5355 / 53 — No Item Name Available
ManufacturerNorthrop Grumman Systems Corp Dba Northrop Grumman Systems Corp
StatusACTIVE
Material Thickness0.406 INCHES NOMINAL IN
Outside Diameter7.375 INCHES NOMINAL IN
Style DesignatorROUND
MaterialGLASS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
9340-00-141-7947 INTERCHANGEABLE
Window,observation
5133-00-228-1348 INTERCHANGEABLE
Drill,twist
1650-00-228-493325151 INTERCHANGEABLE
Guide,reservoir,hydraulic
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
9340-00-261-5712 INTERCHANGEABLE
Window,observation
9340-00-290-7134 INTERCHANGEABLE
Window,observation
5999-00-437-6493531587-1 INTERCHANGEABLE
Delay Line
Raytheon Company Dba Raytheon
9340-00-526-5185200103DBPC463 INTERCHANGEABLE
Window,observation
Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions
6680-00-526-518725J671PC27 INTERCHANGEABLE
Glass,liquid Sight Indicator,fla
Northrop Grumman Systems Corporation Div Marine Systems
8040-01-039-8132 INTERCHANGEABLE
Adhesive
5998-01-108-1775 INTERCHANGEABLE
Circuit Card Assembly
Cross-Reference Index
Part NumberManufacturer
B311-284 PRIMARY Northrop Grumman Systems Corp Dba Northrop Grumman Systems Corp (USA)
MILG2697TYPEA Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
25151 Unisys Corp Defense Systems C S D Field Engineering (USA)
Related Parts
9340-00-141-7947INTERCHANGEABLE
WINDOW,OBSERVATION
5133-00-228-1348INTERCHANGEABLE
DRILL,TWIST
1650-00-228-4933INTERCHANGEABLE
GUIDE,RESERVOIR,HYDRAULIC
25151
9340-00-261-5712INTERCHANGEABLE
WINDOW,OBSERVATION
9340-00-290-7134INTERCHANGEABLE
WINDOW,OBSERVATION
5999-00-437-6493INTERCHANGEABLE
DELAY LINE
531587-1
9340-00-526-5185INTERCHANGEABLE
WINDOW,OBSERVATION
200103DBPC463
6680-00-526-5187INTERCHANGEABLE
GLASS,LIQUID SIGHT INDICATOR,FLA
25J671PC27
8040-01-039-8132INTERCHANGEABLE
ADHESIVE
5998-01-108-1775INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
5930-01-167-4806INTERCHANGEABLE
SWITCH,FLOW
25151
5330-01-198-1597INTERCHANGEABLE
SEAL,PLAIN
MIS512

Frequently Asked Questions

What is NSN 5355-00-668-7896?

NSN 5355-00-668-7896 is a Window,dial, manufactured by Northrop Grumman Systems Corp Dba Northrop Grumman Systems Corp, classified under FSC 5355 (No Item Name Available). Status: active.

What are the part numbers for NSN 5355-00-668-7896?

NSN 5355-00-668-7896 has 3 cross-referenced part numbers: B311-284 (Northrop Grumman Systems Corp Dba Northrop Grumman Systems Corp), MILG2697TYPEA (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 25151 (Unisys Corp Defense Systems C S D Field Engineering).

What NSN replaces 5355-00-668-7896?

There are 12 known substitutes for 5355-00-668-7896: 9340-00-141-7947, 5133-00-228-1348, 1650-00-228-4933 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of B311-284?

Key specifications for B311-284: Material Thickness: 0.406 INCHES NOMINAL IN; Outside Diameter: 7.375 INCHES NOMINAL IN; Style Designator: ROUND; Material: GLASS. 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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