The Hose Assembly,air Breathing, cataloged under National Stock Number 4720-01-666-9182, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-666-9182 |
| Item Name | Hose Assembly,air Breathing |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Status | ACTIVE |
| Measuring Method and Length | 28.0 INCHES NOMINAL OVERALL IN |
| Connection Style | ROUND BOTH ENDS |
| Connection Type | THREADED BOTH ENDS |
| Coupling Style | THREADED INTERNAL BOTH ENDS |
| Cross-Sectional Shape Style | OVAL |
| Outside Diameter | 0.562 INCHES NOMINAL BOTH ENDS IN |
| Nominal Thread Size | 0.75 INCHES BOTH ENDS IN |
| Inside Diameter | 0.406 INCHES NOMINAL BOTH ENDS IN |
| Thread Class | 3B BOTH ENDS |
| Thread Quantity Per Inch | 16 BOTH ENDS |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) BOTH ENDS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| M26626-8-28 | 2/2 Government specification standardization U.S. Government activity |
| MIL-PRF-26626 | 4/1 Identification reference U.S. Government activity |
NSN 4720-01-666-9182 is a Hose Assembly,air Breathing, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
Key specifications for 4720-01-666-9182: Measuring Method and Length: 28.0 INCHES NOMINAL OVERALL IN; Connection Style: ROUND BOTH ENDS; Connection Type: THREADED BOTH ENDS; Coupling Style: THREADED INTERNAL BOTH ENDS. 11 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.