The O-Ring, cataloged under National Stock Number 5331-01-503-1859, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Smiths Aerospace, Inc., Electronic Systems-Grand Rapids. Government technical data includes 1 specification, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-503-1859 |
| Primary Part Number | 31101-1 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Smiths Aerospace, Inc., Electronic Systems-Grand Rapids |
| Status | ACTIVE |
| Center Hole Diameter | 0.185 INCHES NOMINAL IN |
| 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 |
|---|---|
| 31101-1 PRIMARY | Smiths Aerospace, Inc., Electronic Systems-Grand Rapids (USA) |
NSN 5331-01-503-1859 is a O-Ring, manufactured by Smiths Aerospace, Inc., Electronic Systems-Grand Rapids, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-503-1859 has 1 manufacturer part number on file: 31101-1 (Smiths Aerospace, Inc., Electronic Systems-Grand Rapids).
Key specifications for 31101-1: Center Hole Diameter: 0.185 INCHES NOMINAL IN; End Item Identification: TORNADO AIRCRAFT. 1 specification is 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.