The O-Ring, cataloged under National Stock Number 5331-00-822-5980, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Fluid Mechanics Valve Company. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-822-5980 |
| Primary Part Number | 2-1198-4-71 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Fluid Mechanics Valve Company |
| Status | ACTIVE |
| Cross-Sectional Height | 0.125 INCHES NOMINAL IN |
| Material | RUBBER ISOBUTYLENE-ISOPRENE CLASS IIR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 186923 | Eaton Aerospace, Llc Dba Jackson South (USA) |
| 1877644PC9 | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
| 1877644PC9 | Northrop Grumman Systems Corporation (USA) |
| 2-1198-4-71 PRIMARY | Fluid Mechanics Valve Company (USA) |
| 90479PC9 | Eaton Aerospace, Llc Dba Jackson South (USA) |
| Reference | Meaning |
|---|---|
| 593-513-1862818CPC2 | 5/2 Secondary reference U.S. Government activity |
| 593-513-1862821AEPC16 | 5/2 Secondary reference U.S. Government activity |
| 593-513-1862818CPC1 | 5/2 Secondary reference U.S. Government activity |
| 593-522-1862290PC1 | 5/1 Secondary reference U.S. Government activity |
| 593-513-1862821AEPC6 | 5/2 Secondary reference U.S. Government activity |
NSN 5331-00-822-5980 is a O-Ring, manufactured by Fluid Mechanics Valve Company, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-822-5980 has 5 manufacturer part numbers on file: 186923 (Eaton Aerospace, Llc Dba Jackson South), 1877644PC9 (Lockheed Martin Corporation Div Rms - Mitchel Field), 1877644PC9 (Northrop Grumman Systems Corporation), 2-1198-4-71 (Fluid Mechanics Valve Company), 90479PC9 (Eaton Aerospace, Llc Dba Jackson South).
2 possible matches (shared part number, not a government interchangeability claim): 5305-00-978-9379, 1025-01-019-3408. Verify interchangeability with system specifications before substitution.
Key specifications for 2-1198-4-71: Cross-Sectional Height: 0.125 INCHES NOMINAL IN; Material: RUBBER ISOBUTYLENE-ISOPRENE CLASS IIR. 2 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.