The Hose Assembly,air Breathing, cataloged under National Stock Number 4720-01-391-3877, is classified within Federal Supply Class 4720 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is The Boeing Company. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-391-3877 |
| Primary Part Number | 7D0311E0542A |
| Item Name | Hose Assembly,air Breathing |
| FSC / FSG | 4720 / 47 — No Item Name Available |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Connection Type | THREADED BOTH ENDS |
| Thread Quantity Per Inch | 16 BOTH ENDS |
| Style Designator | SLEEVE SECTION |
| Measuring Method and Length | 54.250 INCHES NOMINAL OVERALL IN |
| Operating Pressure | 125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Nominal Thread Size | 0.750 INCHES BOTH ENDS IN |
| Material | STEEL CORROSION RESISTING THIRD PLY |
| Material | PLASTIC POLYAMIDE NYLON FOURTH PLY |
| Material | PLASTIC POLYAMIDE NYLON COVER |
| Wall Thickness | 0.310 INCHES NOMINAL IN |
| Material Document and Classification | ASTM A313, TYPE 302 ASSN STD SINGLE MATERIAL RESPONSE THIRD PLY |
| Thread Series Designator | UNF BOTH ENDS |
| Coupling Style | THREADED INTERNAL BOTH ENDS |
| Material Document and Classification | ASTM A313, TYPE 302 ASSN STD SINGLE MATERIAL RESPONSE REINFORCING WIRE |
| Material | RUBBER SILICONE CLASS Q LINER |
| Material | STEEL CORROSION RESISTING REINFORCING WIRE |
| Cross-Sectional Shape Style | ROUND |
| Inside Diameter | 0.500 INCHES NOMINAL FIRST END IN |
| Minimum Inside Bending Radius | 1.500 INCHES IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 7D0311E0542A | The Boeing Company (USA) |
| 55104 | Halm Instrument Co Inc (USA) |
| 55104E0542A | Halm Instrument Co Inc (USA) |
NSN 4720-01-391-3877 is a Hose Assembly,air Breathing, manufactured by The Boeing Company, classified under FSC 4720 (No Item Name Available). Status: active.
NSN 4720-01-391-3877 has 3 cross-referenced part numbers: 7D0311E0542A (The Boeing Company), 55104 (Halm Instrument Co Inc), 55104E0542A (Halm Instrument Co Inc).
There are 12 known substitutes for 4720-01-391-3877: 5120-00-016-7582, 5330-00-251-3231, 5360-00-260-6666 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 7D0311E0542A: Connection Type: THREADED BOTH ENDS; Thread Quantity Per Inch: 16 BOTH ENDS; Style Designator: SLEEVE SECTION; Measuring Method and Length: 54.250 INCHES NOMINAL OVERALL IN. 21 total characteristics are documented in the Federal Logistics Information System.