The O-Ring, cataloged under National Stock Number 5331-01-477-2840, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-477-2840 |
| Primary Part Number | 522-7325823 ITEM 6 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Cross-Sectional Height | 0.750 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Color | BLACK |
| Center Hole Diameter | 19.000 INCHES MINIMUM AND 19.095 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 522-7325823 ITEM 6 PRIMARY | Naval Sea Systems Command (USA) |
| 7325823-6 PRIMARY | Naval Sea Systems Command (USA) |
| 7325823-6 PRIMARY | Burhan Agencies Llc (USA) |
| 7325823-6 | West American Rubber Company, Llc. Dba West American Rubber Co Llc (USA) |
| Reference | Meaning |
|---|---|
| 14869113 | 5/1 Secondary reference Naval Sea Systems Command |
| 585-6404842-49 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 5331-01-477-2840 is a O-Ring, manufactured by Naval Sea Systems Command, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-477-2840 has 4 manufacturer part numbers on file: 522-7325823 ITEM 6 (Naval Sea Systems Command), 7325823-6 (Naval Sea Systems Command), 7325823-6 (Burhan Agencies Llc), 7325823-6 (West American Rubber Company, Llc. Dba West American Rubber Co Llc).
Key specifications for 522-7325823 ITEM 6: Cross-Sectional Height: 0.750 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN; Color: BLACK; Special Features: RUBBER SEAL DIMENSION TOLERANCES ARE BASED UPON RMA A-3 COMMERCIAL TOLERANCES; MATERIAL IS NEOPRENE 50 = 5 DUROMETER COMPOUND NUMBER 50E18; Center Hole Diameter: 19.000 INCHES MINIMUM AND 19.095 INCHES MAXIMUM IN. 3 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.
NSN 5331-01-477-2840 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.