The O-Ring, cataloged under National Stock Number 5331-01-209-7998, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Eaton Corporation Dba Eaton Inoac Div Eaton. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares 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 | Eaton Corporation Dba Eaton Inoac Div Eaton (CAGE 77842) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-209-7998 |
| Primary Part Number | 52971 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Eaton Corporation Dba Eaton Inoac Div Eaton |
| 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 |
|---|---|
| 52971 PRIMARY | Eaton Corporation Dba Eaton Inoac Div Eaton (USA) |
| 52840 PIECE 14 | Eaton Corporation Dba Eaton Inoac Div Eaton (USA) |
NSN 5331-01-209-7998 is a O-Ring, manufactured by Eaton Corporation Dba Eaton Inoac Div Eaton, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-209-7998 has 2 manufacturer part numbers on file: 52971 (Eaton Corporation Dba Eaton Inoac Div Eaton), 52840 PIECE 14 (Eaton Corporation Dba Eaton Inoac Div Eaton).
1 possible match (shared part number, not a government interchangeability claim): 2590-01-505-0941. 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.