The O-Ring, cataloged under National Stock Number 5331-00-514-4921, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is John Crane, Inc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-514-4921 |
| Primary Part Number | 1820-16 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | John Crane, Inc |
| Status | ACTIVE |
| Cross-Sectional Height | 0.125 INCHES NOMINAL IN |
| Material | RUBBER CHLOROPRENE CLASS CR |
| 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 |
|---|---|
| 1820-16 PRIMARY | John Crane, Inc (USA) |
| Reference | Meaning |
|---|---|
| S16513 | 3/2 Design control — primary reference U.S. Government activity |
| 1756026 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5331-00-514-4921 is a O-Ring, manufactured by John Crane, Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-514-4921 has 1 manufacturer part number on file: 1820-16 (John Crane, Inc).
2 possible matches (shared part number, not a government interchangeability claim): 2805-01-123-4925, 5315-01-173-6538. Verify interchangeability with system specifications before substitution.
Key specifications for 1820-16: Cross-Sectional Height: 0.125 INCHES NOMINAL IN; Material: RUBBER CHLOROPRENE CLASS CR. 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.