The O-Ring, cataloged under National Stock Number 5331-01-213-8344, 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 5 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through both NSN and commercial part number lookups. 34 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5331-01-213-8344 |
| Primary Part Number | MS28775-021 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Sae International Dba Sae International |
| Status | CANCELLED |
| Cross-Sectional Height | 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN |
| Outside Diameter | 1.051 INCHES MINIMUM AND 1.081 INCHES MAXIMUM IN |
| Hardness Rating | 75.0 SHORE DUROMETER A NOMINAL |
| Center Hole Diameter | 0.920 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 8554-634 | Goodrich Actuation Systems SAS (FRA) |
| MS28775-021 | Bae Systems Land & Armaments L.p. (USA) |
| 23,52X1,78-24B7 | Stacem (FRA) |
| 2300-79015 | Leonardo S.p.a. - Electronics Division - Defence Business Area (ITA) |
| WB178G02352AUNL | Cimd (centre D'identification Des Materiels De La Defense) (FRA) |
| MS28775-021 PRIMARY | Sae International Dba Sae International (USA) |
| JT 23.52X1.78-24B7 | Stacem (FRA) |
| Reference | Meaning |
|---|---|
| AS021B46-70 | C/1 Advisory reference — outside the item-of-supply concept Hutchinson Seal Corporation |
| 4067-70-021 | 5/9 Secondary reference Parco, Llc |
| 7377-021 | 5/9 Secondary reference Parker Hannifin Corporation Div O-Ring Division |
| 080-58532-23 | 5/9 Secondary reference U.S. Government activity |
| PRP568-021-4067-70 | 5/9 Secondary reference Parco, Llc |
| 2-021 N304-75 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| N304-75-021 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| 23,52X1,78SR832-75 | 5/9 Secondary reference Le Joint Francais |
| P48026-021 | 5/9 Secondary reference Acushnet Rubber Company, Inc. Dba Precix |
| MS28775-021 | 5/9 Secondary reference U.S. Government activity |
| MS28775-021 | 5/9 Secondary reference Seals & Packings, Llc |
| 10117104 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| I16494SR832-75 | 5/9 Secondary reference Le Joint Francais |
| SAE-AS28775 | 3/1 Design control — primary reference Sae International Dba Sae International |
| SR 832-75-021 | 5/9 Secondary reference U.S. Government activity |
| D-17N-0-99-002P | C/1 Advisory reference — outside the item-of-supply concept Carver Pump Company |
| 5330006311341 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 1446-021 | 5/9 Secondary reference U.S. Government activity |
| MS28775-021 | 5/9 Secondary reference U.S. Government activity |
| MIL-P-25732 | 5/9 Secondary reference U.S. Government activity |
NSN 5331-01-213-8344 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331, O-ring. Status: cancelled.
NSN 5331-01-213-8344 has 7 manufacturer part numbers on file: 8554-634 (Goodrich Actuation Systems SAS), MS28775-021 (Bae Systems Land & Armaments L.p.), 23,52X1,78-24B7 (Stacem), 2300-79015 (Leonardo S.p.a. - Electronics Division - Defence Business Area), WB178G02352AUNL (Cimd (centre D'identification Des Materiels De La Defense)) and 2 more.
2 possible matches (shared part number, not a government interchangeability claim): 7610-01-523-0670, 4220-01-594-4866. Verify interchangeability with system specifications before substitution.
Key specifications for MS28775-021: Cross-Sectional Height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN; Outside Diameter: 1.051 INCHES MINIMUM AND 1.081 INCHES MAXIMUM IN; Hardness Rating: 75.0 SHORE DUROMETER A NOMINAL; Center Hole Diameter: 0.920 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN. 5 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.
NSN 5331-01-213-8344 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.