The O-Ring, cataloged under National Stock Number 5331-00-447-4025, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5331-00-447-4025 |
| Primary Part Number | 58-009-45 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok |
| Status | ACTIVE |
| Cross-Sectional Height | 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN |
| Outside Diameter | 0.348 INCHES NOMINAL IN |
| Center Hole Diameter | 0.202 INCHES MINIMUM AND 0.214 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 |
|---|---|
| 58-009-45 PRIMARY | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA) |
| AS568-009MILG23652TY2 PRIMARY | Sae International Dba Sae International (USA) |
| 10203-26 PRIMARY | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA) |
| Reference | Meaning |
|---|---|
| AS568-009MILG23652TY2 | 5/9 Secondary reference U.S. Government activity |
| 10203-26PC12 | 5/9 Secondary reference Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok |
NSN 5331-00-447-4025 is a O-Ring, manufactured by Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-447-4025 has 3 manufacturer part numbers on file: 58-009-45 (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok), AS568-009MILG23652TY2 (Sae International Dba Sae International), 10203-26 (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok).
3 possible matches (shared part number, not a government interchangeability claim): 5950-00-645-6509, 5950-01-004-7264, 5330-01-077-7123. Verify interchangeability with system specifications before substitution.
Key specifications for 58-009-45: Cross-Sectional Height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN; Outside Diameter: 0.348 INCHES NOMINAL IN; Center Hole Diameter: 0.202 INCHES MINIMUM AND 0.214 INCHES MAXIMUM IN; Material: RUBBER SYNTHETIC. 4 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.