The O-Ring, cataloged under National Stock Number 5331-00-582-1561, 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 6 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-582-1561 |
| Primary Part Number | MS28775-429 |
| 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 | 0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN |
| Outside Diameter | 5.476 INCHES MINIMUM AND 5.574 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE |
| Center Hole Diameter | 4.960 INCHES MINIMUM AND 4.990 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 |
|---|---|
| MS28775-429 PRIMARY | Sae International Dba Sae International (USA) |
| 2300-79244 | Leonardo S.p.a. - Electronics Division - Defence Business Area (ITA) |
| 2-429 N304-75 | Parker-Hannifin Corp Div O-Ring Division (USA) |
| 7302 | Cnh Industrial America Llc Dba Cnh America (USA) |
| 7093E66 PIECE 48 | General Electric Company (USA) |
| PRP568-429-4067-70 | Parco, Llc (USA) |
| 27950-56 | Cnh Industrial America Llc Dba Cnh America (USA) |
| Reference | Meaning |
|---|---|
| MS28775-429 | 3/9 Design control — primary reference U.S. Government activity |
| J-3E48837 PIECE 48 | 5/2 Secondary reference U.S. Government activity |
| MS28775-429 | 5/9 Secondary reference U.S. Government activity |
| 5330005821561 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| 2-429 N304-75 | 5/9 Secondary reference Parker Hannifin Gmbh O-Ring Division |
| H33P1561-654 | 5/9 Secondary reference U.S. Government activity |
| SAE-AS28775 | 3/1 Design control — primary reference Sae International Dba Sae International |
| 164444-429 | 5/9 Secondary reference Komatsu American Intl Co |
| AN6227-56 | 5/9 Secondary reference U.S. Government activity |
NSN 5331-00-582-1561 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-582-1561 has 7 manufacturer part numbers on file: MS28775-429 (Sae International Dba Sae International), 2300-79244 (Leonardo S.p.a. - Electronics Division - Defence Business Area), 2-429 N304-75 (Parker-Hannifin Corp Div O-Ring Division), 7302 (Cnh Industrial America Llc Dba Cnh America), 7093E66 PIECE 48 (General Electric Company) and 2 more.
1 possible match (shared part number, not a government interchangeability claim): 6695-01-183-7077. Verify interchangeability with system specifications before substitution.
Key specifications for MS28775-429: Temp Rating: 275.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN; Outside Diameter: 5.476 INCHES MINIMUM AND 5.574 INCHES MAXIMUM IN; Material Document and Classification: MIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE. 6 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.