The O-Ring, cataloged under National Stock Number 5331-00-421-4950, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Sonfarrel Inc.. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-421-4950 |
| Primary Part Number | 1042259-7 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Sonfarrel Inc. |
| Status | ACTIVE |
| Cross-Sectional Height | 0.023 INCHES MINIMUM AND 0.029 INCHES MAXIMUM IN |
| Center Hole Diameter | 0.046 INCHES MINIMUM AND 0.054 INCHES MAXIMUM IN |
| Material | RUBBER |
| 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 |
|---|---|
| 1042259-7 PRIMARY | Sonfarrel Inc. (USA) |
| Reference | Meaning |
|---|---|
| SZ5824-7 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 952240-7 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
NSN 5331-00-421-4950 is a O-Ring, manufactured by Sonfarrel Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-421-4950 has 1 manufacturer part number on file: 1042259-7 (Sonfarrel Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 5331-00-466-0482, 5365-00-672-1966. Verify interchangeability with system specifications before substitution.
Key specifications for 1042259-7: Cross-Sectional Height: 0.023 INCHES MINIMUM AND 0.029 INCHES MAXIMUM IN; Center Hole Diameter: 0.046 INCHES MINIMUM AND 0.054 INCHES MAXIMUM IN; Material: RUBBER. 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.