The O-Ring, cataloged under National Stock Number 5331-00-225-6616, 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 1 manufacturer part number 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5331-00-225-6616 |
| Primary Part Number | AS3581-145 |
| 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 | 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN |
| Outside Diameter | 2.756 INCHES NOMINAL IN |
| Hardness Rating | 85.0 SHORE DUROMETER A MINIMUM AND 95.0 SHORE DUROMETER A MAXIMUM |
| Elongation Percentage | 100 MAXIMUM |
| Center Hole Diameter | 2.540 INCHES MINIMUM AND 2.560 INCHES MAXIMUM IN |
| Material | RUBBER |
| 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 |
|---|---|
| AS3581-145 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| 481601 | 5/9 Secondary reference Micron Machine Corp |
| 481601 | 5/9 Secondary reference Richmond Lox Equipment Co Sub of Richmond Tank Car Co |
| 481601 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| AS3581-145 | 5/9 Secondary reference U.S. Government activity |
| 481601 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| SAE-AS3581 | 3/1 Design control — primary reference Sae International Dba Sae International |
NSN 5331-00-225-6616 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-225-6616 has 1 manufacturer part number on file: AS3581-145 (Sae International Dba Sae International).
1 possible match (shared part number, not a government interchangeability claim): 5950-01-194-4263. Verify interchangeability with system specifications before substitution.
Key specifications for AS3581-145: Temp Rating: -20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN; Outside Diameter: 2.756 INCHES NOMINAL IN; Hardness Rating: 85.0 SHORE DUROMETER A MINIMUM AND 95.0 SHORE DUROMETER A MAXIMUM. 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.