The O-Ring, cataloged under National Stock Number 5331-01-528-8367, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Hader-Seitz Inc. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5331-01-528-8367 |
| Primary Part Number | 2190020 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Hader-Seitz Inc |
| 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 |
|---|---|
| 2190020 PRIMARY | Hader-Seitz Inc (USA) |
| Reference | Meaning |
|---|---|
| 801-1163 | D/9 Drawing number reference only Hader-Seitz Inc |
NSN 5331-01-528-8367 is a O-Ring, manufactured by Hader-Seitz Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-528-8367 has 1 manufacturer part number on file: 2190020 (Hader-Seitz Inc).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-528-8368. Verify interchangeability with system specifications before substitution.
Key specifications for 2190020: Special Features: USED ON CYLINDER ASSEMBLY; End Item Identification: NSN 1925-01-509-7013 TUGBOAT. 0 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.