The O-Ring, cataloged under National Stock Number 5331-01-181-2438, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Fluid Mechanics Valve Company. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | Fluid Mechanics Valve Company (CAGE 52253) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-181-2438 |
| Primary Part Number | 2-1198-2-38 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Fluid Mechanics Valve Company |
| 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 |
|---|---|
| 18956 ITEM 11 | Fluid Mechanics Valve Company (USA) |
| 2-1198-2-38 PRIMARY | Fluid Mechanics Valve Company (USA) |
| Reference | Meaning |
|---|---|
| 2-1198-2-38 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5331-01-181-2438 is a O-Ring, manufactured by Fluid Mechanics Valve Company, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-181-2438 has 2 manufacturer part numbers on file: 18956 ITEM 11 (Fluid Mechanics Valve Company), 2-1198-2-38 (Fluid Mechanics Valve Company).
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.