The O-Ring, cataloged under National Stock Number 5331-01-657-4420, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Calgon Carbon Uv Technologies Llc Dba Hyde Marine. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-657-4420 |
| Primary Part Number | 552676 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Calgon Carbon Uv Technologies Llc Dba Hyde Marine |
| Status | ACTIVE |
| Cross-Sectional Height | 0.5 INCHES NOMINAL IN |
| Outside Diameter | 18.0 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5331-01-657-4420 is a O-Ring, manufactured by Calgon Carbon Uv Technologies Llc Dba Hyde Marine, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-657-4420 has 2 manufacturer part numbers on file: 40078607 (Ministry of Defence, Future Aircraft Carrier Ipt (cvf Ipt)), 552676 (Calgon Carbon Uv Technologies Llc Dba Hyde Marine).
Key specifications for 552676: Cross-Sectional Height: 0.5 INCHES NOMINAL IN; Outside Diameter: 18.0 INCHES NOMINAL IN; Special Features: WEIGHT: 1LB LBS; Part Name Assigned by Controlling Agency: FILTER SEAL. 2 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.