The O-Ring, cataloged under National Stock Number 5331-00-684-1185, 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 6 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5331-00-684-1185 |
| Primary Part Number | MS28775-450 |
| 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 | 10.953 INCHES MINIMUM AND 11.097 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE |
| Center Hole Diameter | 10.445 INCHES MINIMUM AND 10.505 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 |
|---|---|
| MS28775-450 PRIMARY | Sae International Dba Sae International (USA) |
| 1820-77 | John Crane, Inc (USA) |
| 2-450 N304-75 | Parker-Hannifin Corp Div O-Ring Division (USA) |
| 230079265 | Leonardo S.p.a. - Electronics Division - Defence Business Area (ITA) |
| PRP568-450-4067-70 | Parco, Llc (USA) |
| N0304 2-450 | Parker-Hannifin Corp Div O-Ring Division (USA) |
| Reference | Meaning |
|---|---|
| SAE-AS28775 | 3/1 Design control — primary reference Sae International Dba Sae International |
| MS28775-450 | 5/9 Secondary reference U.S. Government activity |
| MS28775-450 | 3/9 Design control — primary reference U.S. Government activity |
| 2-450 N304-75 | 5/9 Secondary reference Parker Hannifin Gmbh O-Ring Division |
| 5330006841185 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| 1820-77 | 5/9 Secondary reference U.S. Government activity |
NSN 5331-00-684-1185 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-684-1185 has 6 manufacturer part numbers on file: MS28775-450 (Sae International Dba Sae International), 1820-77 (John Crane, Inc), 2-450 N304-75 (Parker-Hannifin Corp Div O-Ring Division), 230079265 (Leonardo S.p.a. - Electronics Division - Defence Business Area), PRP568-450-4067-70 (Parco, Llc) and 1 more.
2 possible matches (shared part number, not a government interchangeability claim): 1730-01-643-4651, 5340-01-701-7900. Verify interchangeability with system specifications before substitution.
Key specifications for MS28775-450: Temp Rating: 275.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN; Outside Diameter: 10.953 INCHES MINIMUM AND 11.097 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.