The O-Ring, cataloged under National Stock Number 5331-01-565-4569, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Fiber Systems International, Inc. Div Fiber Systems International. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Fiber Systems International, Inc. Div Fiber Systems International (CAGE 0YPM2); Engineered Seal Products, Inc. (CAGE 4K660) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-565-4569 |
| Primary Part Number | FSPP-309-04-319 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Fiber Systems International, Inc. Div Fiber Systems International |
| 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 |
|---|---|
| FSPP-309-04-319 PRIMARY | Fiber Systems International, Inc. Div Fiber Systems International (USA) |
| FSPP-309-04-319 | Engineered Seal Products, Inc. (USA) |
NSN 5331-01-565-4569 is a O-Ring, manufactured by Fiber Systems International, Inc. Div Fiber Systems International, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-565-4569 has 2 manufacturer part numbers on file: FSPP-309-04-319 (Fiber Systems International, Inc. Div Fiber Systems International), FSPP-309-04-319 (Engineered Seal Products, Inc.).
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.