The O-Ring, cataloged under National Stock Number 5331-00-451-6543, 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. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Sae International Dba Sae International (CAGE 0U583) |
| Parameter | Value |
|---|---|
| NSN | 5331-00-451-6543 |
| Primary Part Number | AS568B-331 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| 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 |
|---|---|
| AS568B-331 | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| 2-331N674-70 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| AS568B-331 | 5/9 Secondary reference U.S. Government activity |
| 2-331 N674-7 | 3/1 Design control — primary reference Parker-Hannifin Corp Div O-Ring Division |
| 5700031-068 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 0065234.53.63 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| AS5168B-331 | 5/9 Secondary reference U.S. Government activity |
| 0T65234.53.63 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 0N65234.53.63 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 52561A331 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5331-00-451-6543 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-451-6543 has 1 manufacturer part number on file: AS568B-331 (Sae International Dba Sae International).
2 possible matches (shared part number, not a government interchangeability claim): 5331-01-269-9196, 5331-01-512-7479. Verify interchangeability with system specifications before substitution.
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.