The O-Ring, cataloged under National Stock Number 5331-00-579-7191, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Sae International Dba Sae International. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5331-00-579-7191 |
| Primary Part Number | MS28775-339 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Temp Rating | 275.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN |
| Outside Diameter | 3.645 INCHES NOMINAL IN |
| Material Document and Classification | MIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE |
| Elongation Percentage | 160 MAXIMUM |
| Center Hole Diameter | 3.210 INCHES MINIMUM AND 3.240 INCHES MAXIMUM IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| 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 |
|---|---|
| 38R037P242 | Leonardo S.p.a Land & Naval Defence Electronics Division (ITA) |
| MS28775-339 PRIMARY | Sae International Dba Sae International (USA) |
| 15332866 | Bae Systems Marine Limited (GBR) |
| Reference | Meaning |
|---|---|
| OR1-339 | 5/1 Secondary reference Orion S/a |
| SAE-AS28775 | 3/1 Design control — primary reference Sae International Dba Sae International |
| MS28775-339 | 5/9 Secondary reference U.S. Government activity |
| 10053868 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| MS28775-339 | 5/9 Secondary reference U.S. Government activity |
| 13207E7124FN10 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5331-00-579-7191 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-579-7191 has 3 manufacturer part numbers on file: 38R037P242 (Leonardo S.p.a Land & Naval Defence Electronics Division), MS28775-339 (Sae International Dba Sae International), 15332866 (Bae Systems Marine Limited).
2 possible matches (shared part number, not a government interchangeability claim): 5331-01-072-9193, 5331-01-363-4891. Verify interchangeability with system specifications before substitution.
Key specifications for MS28775-339: Temp Rating: 275.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN; Outside Diameter: 3.645 INCHES NOMINAL IN; Material Document and Classification: MIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE. 7 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.