The Hose Assembly,air Duct, cataloged under National Stock Number 4720-01-361-3940, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Flexfab Llc. Government technical data includes 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-361-3940 |
| Primary Part Number | BOE2139-0001 |
| Item Name | Hose Assembly,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Flexfab Llc |
| Status | ACTIVE |
| Measuring Method and Length | 120.000 INCHES NOMINAL OVERALL IN |
| Minimum Inside Bending Radius | 2.000 INCHES IN |
| Connection Type | COUPLING BOTH ENDS |
| Style Designator | FULLY CONVOLUTED W/ WIRE RINGS BETWEEN CONVOLUTIONS |
| Coupling Style | CONNECTOR, OXYGEN HOSE TO REGULATOR (NOTE: APPLICABLE TO HOSE ASSEMBLY, AIR BREATHING ONLY.) SECOND END |
| Coupling Style | INTERNAL QUICK-DISCONNECT FIRST END |
| Cross-Sectional Shape Style | ROUND |
| Wall Thickness | 0.176 INCHES NOMINAL IN |
| Operating Pressure | 3.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| End Inside Width | 2.625 INCHES NOMINAL BOTH ENDS IN |
| Inside Diameter | 2.625 INCHES NOMINAL FIRST END IN |
| End Overall Length | 3.000 INCHES NOMINAL SECOND END IN |
| End Overall Length | 3.000 INCHES NOMINAL FIRST END IN |
| End Inside Diameter | 2.625 INCHES NOMINAL BOTH ENDS IN |
| End Inside Length | 6.750 INCHES NOMINAL BOTH ENDS IN |
| Material | STEEL CORROSION RESISTING SECOND PLY |
| Material | PLASTIC FLUOROSILICONE FIRST PLY |
| Material | PLASTIC POLYESTER THIRD PLY |
| 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 |
|---|---|
| BOE2139-0001 PRIMARY | Flexfab Llc (USA) |
| Reference | Meaning |
|---|---|
| DAA7228P101-101 | 5/2 Secondary reference U.S. Government activity |
| DAA7228P101 | D/9 Drawing number reference only U.S. Government activity |
NSN 4720-01-361-3940 is a Hose Assembly,air Duct, manufactured by Flexfab Llc, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-361-3940 has 1 manufacturer part number on file: BOE2139-0001 (Flexfab Llc).
Key specifications for BOE2139-0001: Measuring Method and Length: 120.000 INCHES NOMINAL OVERALL IN; Minimum Inside Bending Radius: 2.000 INCHES IN; Connection Type: COUPLING BOTH ENDS; Style Designator: FULLY CONVOLUTED W/ WIRE RINGS BETWEEN CONVOLUTIONS. 18 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.