The O-Ring, cataloged under National Stock Number 5331-01-189-2776, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Siemens Energy, Inc.. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Siemens Energy, Inc. (CAGE 16712) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-189-2776 |
| Primary Part Number | PP-023AA/0900 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Siemens Energy, Inc. |
| 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 |
|---|---|
| PP-023AA/0900 PRIMARY | Siemens Energy, Inc. (USA) |
| Reference | Meaning |
|---|---|
| PP-023AA/0900 | 5/9 Secondary reference Circor Pumps North America Llc |
| SG-4216 PIECE 28 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG-4216 PIECE 28 | 5/9 Secondary reference Circor Pumps North America Llc |
NSN 5331-01-189-2776 is a O-Ring, manufactured by Siemens Energy, Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-189-2776 has 1 manufacturer part number on file: PP-023AA/0900 (Siemens Energy, 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.