The O-Ring, cataloged under National Stock Number 5331-01-688-4491, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is E. P. Barrus Limited Div Special Products. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 5331-01-688-4491 |
| Primary Part Number | 25-898101132 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | E. P. Barrus Limited Div Special Products |
| 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 |
|---|---|
| 25-898101132 | E. P. Barrus Limited Div Special Products (GBR) |
| Reference | Meaning |
|---|---|
| 25-898101132 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5331-01-688-4491 is a O-Ring, manufactured by E. P. Barrus Limited Div Special Products, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-688-4491 has 1 manufacturer part number on file: 25-898101132 (E. P. Barrus Limited Div Special Products).
Key specifications for 25-898101132: Special Features: WEIGHT 0.01, LENGTH 0.38, WIDTH 0.38, HEIGHT 0.13; Part Name Assigned by Controlling Agency: O-RING. 0 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.