The O-Ring, cataloged under National Stock Number 5331-01-573-6221, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Eaton Filtration Llc. Government technical data includes 1 specification, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-573-6221 |
| Primary Part Number | ST506Z5B |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Eaton Filtration Llc |
| Status | ACTIVE |
| Material | RUBBER SYNTHETIC |
| 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 |
|---|---|
| ST506Z5B PRIMARY | Eaton Filtration Llc (USA) |
NSN 5331-01-573-6221 is a O-Ring, manufactured by Eaton Filtration Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-573-6221 has 1 manufacturer part number on file: ST506Z5B (Eaton Filtration Llc).
Key specifications for ST506Z5B: Part Name Assigned by Controlling Agency: COVER,O-RING; End Item Identification: STRAINER, DUPLEX FUEL 1.5 INS P/N 53BTX; Material: RUBBER SYNTHETIC. 1 specification is 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.