The O-Ring, cataloged under National Stock Number 5331-01-593-7279, 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 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-593-7279 |
| Primary Part Number | 721-8217289-74 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Cross-Sectional Height | 0.275 INCHES NOMINAL IN |
| Material Document and Classification | MIL-R-83248 TY-1 MIL SPEC SINGLE MATERIAL RESPONSE |
| Center Hole Diameter | 6.225 INCHES NOMINAL IN |
| Material | PLASTIC FLUOROCARBON |
| 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 |
|---|---|
| 721-8217289-74 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H861-6110-74 | 5/2 Secondary reference U.S. Government activity |
| 54-67-3438 | 5/2 Secondary reference U.S. Government activity |
NSN 5331-01-593-7279 is a O-Ring, manufactured by Naval Sea Systems Command, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-593-7279 has 1 manufacturer part number on file: 721-8217289-74 (Naval Sea Systems Command).
Key specifications for 721-8217289-74: Cross-Sectional Height: 0.275 INCHES NOMINAL IN; Material Document and Classification: MIL-R-83248 TY-1 MIL SPEC SINGLE MATERIAL RESPONSE; Center Hole Diameter: 6.225 INCHES NOMINAL IN; End Item Identification: PAYLOAD TUBE MUZZLE HATCH OPERATOR. 4 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.