The O-Ring, cataloged under National Stock Number 5331-01-624-8018, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Fmc Technologies Inc Dba Fmc Fluid Control. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5331-01-624-8018 |
| Primary Part Number | A90-254 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Fmc Technologies Inc Dba Fmc Fluid Control |
| Status | ACTIVE |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Specification/standard Data | 813434-AS568A MANUFACTURERS STANDARD |
| Center Hole Diameter | 5.449 INCHES MINIMUM AND 5.519 INCHES MAXIMUM IN |
| 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 |
|---|---|
| DU500010589 REV-A ITEM 20 | Fmc Technologies Inc Dba Fmc Fluid Control (USA) |
| AS568A-254 | Sae International Dba Sae International (USA) |
| A90-254 PRIMARY | Fmc Technologies Inc Dba Fmc Fluid Control (USA) |
| Reference | Meaning |
|---|---|
| AS568A-254 | 5/9 Secondary reference U.S. Government activity |
NSN 5331-01-624-8018 is a O-Ring, manufactured by Fmc Technologies Inc Dba Fmc Fluid Control, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-624-8018 has 3 manufacturer part numbers on file: DU500010589 REV-A ITEM 20 (Fmc Technologies Inc Dba Fmc Fluid Control), AS568A-254 (Sae International Dba Sae International), A90-254 (Fmc Technologies Inc Dba Fmc Fluid Control).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-647-9011. Verify interchangeability with system specifications before substitution.
Key specifications for A90-254: Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Specification/standard Data: 813434-AS568A MANUFACTURERS STANDARD; Center Hole Diameter: 5.449 INCHES MINIMUM AND 5.519 INCHES MAXIMUM IN; End Item Identification: PUMP ASSEMBLY,RECIPROCATING. 3 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.