PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

525-3Plate,seal

Ontic Engineering & Manufacturing, Inc Dba Ontic Us · NSN 1650-00-166-6108 · FSC 1650 · No Item Name Available
Verified by PartsTable
NSN 1650-00-166-6108 — this item is cataloged by the U.S. Government under National Stock Number 1650-00-166-6108. Primary manufacturer part number: 525-3.
Features
  • Plate,seal — FSC 1650
  • 2 verified cross-references
  • Primary manufacturer: Ontic Engineering & Manufacturing, Inc Dba Ontic Us
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The Plate,seal, cataloged under National Stock Number 1650-00-166-6108, is classified within Federal Supply Class 1650 (No Item Name Available) of the Aircraft Components and Accessories group. The primary manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. 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.

Catalog Facts
Item NamePlate,seal
FSC / FSG1650 — No Item Name Available (FSG 16)
ManufacturersOntic Engineering & Manufacturing, Inc Dba Ontic Us (CAGE 45934); Donallco Inc (CAGE 56705)
Technical Specifications
ParameterValue
NSN1650-00-166-6108
Primary Part Number525-3
Item NamePlate,seal
FSC / FSG1650 / 16 — No Item Name Available
ManufacturerOntic Engineering & Manufacturing, Inc Dba Ontic Us
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6685-00-115-86905253 INTERCHANGEABLE
Thermometer,self-Indicating
Weksler Glass Thermometer Corp
4720-00-323-241347-150-186-5 INTERCHANGEABLE
Hose,air Duct
Bell Textron Inc
4320-00-431-1694N5-253 INTERCHANGEABLE
End Bell Assembly
Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.
5935-00-534-77548900-0185-001 INTERCHANGEABLE
Connector,receptacle,electrical
Antenna Products Corporation Dba Antenna Products Corp
5935-00-725-3166 INTERCHANGEABLE
Connector,receptacle,electrical
6680-00-758-9330M144 INTERCHANGEABLE
Indicator,sight,liquid
Eaton Aerospace Llc Div Fluid and Electrical Distribution Division
5975-00-899-023574349A INTERCHANGEABLE
Box Connector,electrical
Air Products & Chemicals, Inc
5305-01-179-90015253 INTERCHANGEABLE
Screw,cap,hexagon Head
Erie Malleable Iron Co
5995-01-244-29531640891-42 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Raytheon Company Div Rmd Strategic
5120-01-335-0701 INTERCHANGEABLE
Adapter,socket Wrench
Cross-Reference Index
Part NumberManufacturer
525-3 PRIMARY Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA)
525-3 Donallco Inc (USA)
Related Parts
6685-00-115-8690INTERCHANGEABLE
THERMOMETER,SELF-INDICATING
5253
4720-00-323-2413INTERCHANGEABLE
HOSE,AIR DUCT
47-150-186-5
4320-00-431-1694INTERCHANGEABLE
END BELL ASSEMBLY
N5-253
5935-00-534-7754INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
8900-0185-001
5935-00-725-3166INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
6680-00-758-9330INTERCHANGEABLE
INDICATOR,SIGHT,LIQUID
M144
5975-00-899-0235INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
74349A
5305-01-179-9001INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5253
5995-01-244-2953INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
1640891-42
5120-01-335-0701INTERCHANGEABLE
ADAPTER,SOCKET WRENCH
5120-01-399-9748INTERCHANGEABLE
ADAPTER,SOCKET WRENCH
5253
1560-01-436-5105INTERCHANGEABLE
TANK,FUEL,AIRCRAFT

Frequently Asked Questions

What is NSN 1650-00-166-6108?

NSN 1650-00-166-6108 is a Plate,seal, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 1650 (No Item Name Available). Status: active.

What are the part numbers for NSN 1650-00-166-6108?

NSN 1650-00-166-6108 has 2 cross-referenced part numbers: 525-3 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us), 525-3 (Donallco Inc).

What NSN replaces 1650-00-166-6108?

There are 12 known substitutes for 1650-00-166-6108: 6685-00-115-8690, 4720-00-323-2413, 4320-00-431-1694 and 9 more. Verify interchangeability with system specifications before substitution.

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