The Hose,air Duct, cataloged under National Stock Number 4720-00-138-9031, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4720-00-138-9031 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Status | ACTIVE |
| Measuring Method and Length | 12.000 INCHES NOMINAL OVERALL IN |
| Connection Style | ROUND BOTH ENDS |
| Connection Type | PREFORMED BOTH ENDS |
| Style Designator | SLEEVE SECTION |
| Cross-Sectional Shape Style | ROUND |
| Wall Thickness | 0.125 INCHES NOMINAL IN |
| Inside Diameter | 1.250 INCHES NOMINAL FIRST END IN |
| End Overall Length | 0.750 INCHES NOMINAL BOTH ENDS IN |
| End Inside Diameter | 1.250 INCHES NOMINAL BOTH ENDS IN |
| Material | STEEL REINFORCING WIRE |
| Material | PLASTIC POLYAMIDE NYLON AND RUBBER SYNTHETIC FIRST PLY |
| Material | PLASTIC POLYAMIDE NYLON AND RUBBER SYNTHETIC SECOND PLY |
| 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 |
|---|---|
| 1853365-1 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| CWY 12IN | 3/9 Design control — primary reference U.S. Government activity |
NSN 4720-00-138-9031 is a Hose,air Duct, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4720-00-760-6191. Verify interchangeability with system specifications before substitution.
Key specifications for 4720-00-138-9031: Measuring Method and Length: 12.000 INCHES NOMINAL OVERALL IN; Connection Style: ROUND BOTH ENDS; Connection Type: PREFORMED BOTH ENDS; Style Designator: SLEEVE SECTION. 12 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.