PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21803O-Ring

Inter-Coastal Electronics, Llc · NSN 5331-01-685-9122 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-685-9122 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-685-9122. Primary manufacturer part number: 21803.
Features
  • O-Ring — FSC 5331
  • 1 verified cross-reference
  • Primary manufacturer: Inter-Coastal Electronics, Llc
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-01-685-9122, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Inter-Coastal Electronics, Llc. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5331-01-685-9122
Primary Part Number21803
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerInter-Coastal Electronics, Llc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
3110-00-112-13169000-0019 INTERCHANGEABLE
Plate,retaining,bearing
Regal-Beloit Corporation Dba Fasco Group Div Cassville Division
5120-00-180-293621803 INTERCHANGEABLE
Clamp,screw,quick Adjusting
Wilton Corp Wilton Tool Div
2990-00-432-133321803 INTERCHANGEABLE
Muffler,exhaust
Walker Mfg Co
5961-01-169-6501 INTERCHANGEABLE
Transistor
5998-01-383-740521803 INTERCHANGEABLE
Circuit Card Assembly
Motorola/codex Corp Sub of Motorola Inc
7510-01-389-3521 INTERCHANGEABLE
Tape,identification
3040-01-419-363221803 INTERCHANGEABLE
Hub,body
Elbitamerica, Inc.
4810-01-699-456921803-1003-1 INTERCHANGEABLE
Cap,valve
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4810-01-699-457821803-1002-1 INTERCHANGEABLE
Cap,valve
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
Cross-Reference Index
Part NumberManufacturer
21803 PRIMARY Inter-Coastal Electronics, Llc (USA)
Related Parts
3110-00-112-1316INTERCHANGEABLE
PLATE,RETAINING,BEARING
9000-0019
5120-00-180-2936INTERCHANGEABLE
CLAMP,SCREW,QUICK ADJUSTING
21803
2990-00-432-1333INTERCHANGEABLE
MUFFLER,EXHAUST
21803
5961-01-169-6501INTERCHANGEABLE
TRANSISTOR
5998-01-383-7405INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
21803
7510-01-389-3521INTERCHANGEABLE
TAPE,IDENTIFICATION
3040-01-419-3632INTERCHANGEABLE
HUB,BODY
21803
4810-01-699-4569INTERCHANGEABLE
CAP,VALVE
21803-1003-1
4810-01-699-4578INTERCHANGEABLE
CAP,VALVE
21803-1002-1

Frequently Asked Questions

What is NSN 5331-01-685-9122?

NSN 5331-01-685-9122 is a O-Ring, manufactured by Inter-Coastal Electronics, Llc, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-685-9122?

NSN 5331-01-685-9122 has 1 cross-referenced part number: 21803 (Inter-Coastal Electronics, Llc).

What NSN replaces 5331-01-685-9122?

There are 9 known substitutes for 5331-01-685-9122: 3110-00-112-1316, 5120-00-180-2936, 2990-00-432-1333 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21803?

Key specifications for 21803: End Item Identification: AIR-LAND INTEROPERABILITY GATEWAY NETWORK (ALIGN) TACTICAL HELICOPTER REHEARSAL AUTONOMOUS SAFETY AND TRAINING (THRUST) POD. 1 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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