The O-Ring, cataloged under National Stock Number 5331-00-255-6273, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Services, Llc. Government technical data includes 3 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 5331-00-255-6273 |
| Primary Part Number | 2121754 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Lockheed Martin Services, Llc |
| Status | ACTIVE |
| Cross-Sectional Height | 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN |
| Center Hole Diameter | 2.229 INCHES MINIMUM AND 2.249 INCHES MAXIMUM IN |
| Material | RUBBER SYNTHETIC |
| 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 |
|---|---|
| 2121754 PRIMARY | Lockheed Martin Services, Llc (USA) |
| Reference | Meaning |
|---|---|
| 2121754 | C/1 Advisory reference — outside the item-of-supply concept International Business Machines Corporation Dba IBM |
NSN 5331-00-255-6273 is a O-Ring, manufactured by Lockheed Martin Services, Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-255-6273 has 1 manufacturer part number on file: 2121754 (Lockheed Martin Services, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5365-01-594-7176. Verify interchangeability with system specifications before substitution.
Key specifications for 2121754: Cross-Sectional Height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN; Center Hole Diameter: 2.229 INCHES MINIMUM AND 2.249 INCHES MAXIMUM IN; Material: RUBBER SYNTHETIC. 3 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.