The O-Ring, cataloged under National Stock Number 5331-01-644-9111, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Moog Military Aircraft Llc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Moog Military Aircraft Llc (CAGE 9P5N5) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-644-9111 |
| Primary Part Number | CB52128-001 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Moog Military Aircraft Llc |
| 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 |
|---|---|
| CB52128-001 PRIMARY | Moog Military Aircraft Llc (USA) |
| Reference | Meaning |
|---|---|
| CB52128-001 | 5/9 Secondary reference U.S. Government activity |
| CB52128 | D/9 Drawing number reference only U.S. Government activity |
NSN 5331-01-644-9111 is a O-Ring, manufactured by Moog Military Aircraft Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-644-9111 has 1 manufacturer part number on file: CB52128-001 (Moog Military Aircraft Llc).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-685-0197. Verify interchangeability with system specifications before substitution.
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.