The O-Ring, cataloged under National Stock Number 5331-01-028-8289, 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 1 manufacturer part number 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5331-01-028-8289 |
| Primary Part Number | AS3581-325 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Temp Rating | -20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN |
| Outside Diameter | 1.895 INCHES NOMINAL IN |
| Hardness Rating | 90.0 SHORE DUROMETER A NOMINAL |
| Center Hole Diameter | 1.460 INCHES MINIMUM AND 1.490 INCHES MAXIMUM IN |
| Material | RUBBER FLUOROCARBON CLASS FPM |
| 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 |
|---|---|
| AS3581-325 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| AS3581-325 | 3/9 Design control — primary reference U.S. Government activity |
| SAE-AS3581 | 3/1 Design control — primary reference Sae International Dba Sae International |
| MIL- -83248/2 | 5/9 Secondary reference U.S. Government activity |
| M83248/2-325 | 5/9 Secondary reference U.S. Government activity |
| 2246F PIECE 157 | C/1 Advisory reference — outside the item-of-supply concept The Babcock & Wilcox Company Dba B & W Service Co Div B&w Service Company |
NSN 5331-01-028-8289 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-028-8289 has 1 manufacturer part number on file: AS3581-325 (Sae International Dba Sae International).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-549-4748. Verify interchangeability with system specifications before substitution.
Key specifications for AS3581-325: Temp Rating: -20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN; Outside Diameter: 1.895 INCHES NOMINAL IN; Hardness Rating: 90.0 SHORE DUROMETER A NOMINAL. 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.