The O-Ring, cataloged under National Stock Number 5331-01-625-6681, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Epsilon Systems Solutions, Inc Div Advanced Products Group. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Epsilon Systems Solutions, Inc Div Advanced Products Group (CAGE 74WY5) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-625-6681 |
| Primary Part Number | 5476-10131 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Epsilon Systems Solutions, Inc Div Advanced Products Group |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 5476-10131 PRIMARY | Epsilon Systems Solutions, Inc Div Advanced Products Group (USA) |
| Reference | Meaning |
|---|---|
| 5476-10131 | 3/9 Design control — primary reference Epsilon Systems Solutions Inc Div Mission Readiness Group |
NSN 5331-01-625-6681 is a O-Ring, manufactured by Epsilon Systems Solutions, Inc Div Advanced Products Group, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-625-6681 has 1 manufacturer part number on file: 5476-10131 (Epsilon Systems Solutions, Inc Div Advanced Products Group).
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.