The O-Ring, cataloged under National Stock Number 5331-00-551-8251, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Sae International Dba Sae International. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 16 commercial cross-references from 15 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5331-00-551-8251 |
| Primary Part Number | AS3578-028 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-Ring |
| Manufacturer | Sae International Dba Sae International |
| Status | CANCELLED |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| Outside Diameter | 1.504 INCHES NOMINAL IN |
| Center Hole Diameter | 1.358 INCHES MINIMUM AND 1.370 INCHES MAXIMUM IN |
| Elongation Percentage | 200 MAXIMUM |
| Hardness Rating | 65.0 SHORE DUROMETER A NOMINAL |
| Cross-Sectional Height | 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| AS3578-028 | Aertekno S.r.l. (ITA) |
| AS3578-028 | Milipol Zrt. (milipol Corp.) (HUN) |
| MS9021-028ES | Eriks B.v. (NLD) |
| AS3578-028 | Bma Buizza Mazzei Agency Srl (ITA) |
| AS3578-028 | Elbit Systems of America - Night Vision Llc (USA) |
| AS3578-028 | Society of Automotive Engineers Inc (USA) |
| AS3578-028 PRIMARY | Sae International Dba Sae International (USA) |
| PRP568-028-4024-65 | Parco, Llc (USA) |
| FEN-1G-155 | Fenn Night Vision Limited (GBR) |
| 447144016704 | Ncb Hungary (honvedsegi Egyseges Termekkod) (HUN) |
| AS3578-028 | Combat Kereskedelmi Kft. Combat Trade Company (HUN) |
| MS9021-028 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| 5331PL0657027 | Jednolity Indeks Materialowy - Uniform Material Index (POL) |
| 10138289 | Nimikkeistokeskus Ncb Finland (FIN) |
| AS3578-028 | Tecno Trade S.r.l. (ITA) |
| SAE-AS3578 | Sae International Dba Sae International (USA) |
NSN 5331-00-551-8251 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331 (O-Ring). Status: cancelled.
NSN 5331-00-551-8251 has 16 cross-referenced part numbers: AS3578-028 (Aertekno S.r.l.), AS3578-028 (Milipol Zrt. (milipol Corp.)), MS9021-028ES (Eriks B.v.), AS3578-028 (Bma Buizza Mazzei Agency Srl), AS3578-028 (Elbit Systems of America - Night Vision Llc) and 11 more.
There is 1 known substitute for 5331-00-551-8251: 5331-00-551-8252. Verify interchangeability with system specifications before substitution.
Key specifications for AS3578-028: Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR; Outside Diameter: 1.504 INCHES NOMINAL IN; Center Hole Diameter: 1.358 INCHES MINIMUM AND 1.370 INCHES MAXIMUM IN; Elongation Percentage: 200 MAXIMUM. 6 total characteristics are documented in the Federal Logistics Information System.
NSN 5331-00-551-8251 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.