The O-Ring, cataloged under National Stock Number 5331-01-054-2371, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Dover Resources, Inc. Div Norriseal. Government technical data includes 2 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5331-01-054-2371 |
| Primary Part Number | 52561A346 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Dover Resources, Inc. Div Norriseal |
| Status | ACTIVE |
| Cross-Sectional Height | 0.210 INCHES NOMINAL IN |
| 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 |
|---|---|
| 52561A346 PRIMARY | Dover Resources, Inc. Div Norriseal (USA) |
| Reference | Meaning |
|---|---|
| 52561A346 | 5/2 Secondary reference U.S. Government activity |
NSN 5331-01-054-2371 is a O-Ring, manufactured by Dover Resources, Inc. Div Norriseal, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-054-2371 has 1 manufacturer part number on file: 52561A346 (Dover Resources, Inc. Div Norriseal).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-080-9066. Verify interchangeability with system specifications before substitution.
Key specifications for 52561A346: Cross-Sectional Height: 0.210 INCHES NOMINAL IN; Material: RUBBER SYNTHETIC. 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.