The Hose Assembly,air Breathing, cataloged under National Stock Number 4720-01-391-3875, 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 Hydraflow. 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 | 4720-01-391-3875 |
| Primary Part Number | 55104E1110A |
| Item Name | Hose Assembly,air Breathing |
| FSC / FSG | 4720 / 47 — No Item Name Available |
| Manufacturer | Hydraflow |
| Status | ACTIVE |
| Material | RUBBER SILICONE CLASS Q LINER |
| Inside Diameter | 0.500 INCHES NOMINAL FIRST END IN |
| Operating Pressure | 125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Thread Quantity Per Inch | 16 BOTH ENDS |
| Connection Type | THREADED BOTH ENDS |
| Thread Series Designator | UNF BOTH ENDS |
| Material | STEEL CORROSION RESISTING REINFORCING WIRE |
| Measuring Method and Length | 111.000 INCHES NOMINAL OVERALL IN |
| Material Document and Classification | ASTM A313, TYPE 302 ASSN STD SINGLE MATERIAL RESPONSE REINFORCING WIRE |
| Nominal Thread Size | 0.750 INCHES BOTH ENDS IN |
| Coupling Style | THREADED INTERNAL BOTH ENDS |
| Cross-Sectional Shape Style | ROUND |
| Style Designator | SLEEVE SECTION |
| Wall Thickness | 0.310 INCHES NOMINAL IN |
| Minimum Inside Bending Radius | 1.500 INCHES IN |
| Material Document and Classification | ASTM A313, TYPE 302 ASSN STD SINGLE MATERIAL RESPONSE THIRD PLY |
| Material | STEEL CORROSION RESISTING THIRD PLY |
| Material | PLASTIC POLYAMIDE NYLON FOURTH PLY |
| Material | PLASTIC POLYAMIDE NYLON COVER |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 7D0311E1110A | The Boeing Company (USA) |
| 55104 | Hydraflow (USA) |
| 55104E1110A PRIMARY | Hydraflow (USA) |
NSN 4720-01-391-3875 is a Hose Assembly,air Breathing, manufactured by Hydraflow, classified under FSC 4720 (No Item Name Available). Status: active.
NSN 4720-01-391-3875 has 3 cross-referenced part numbers: 7D0311E1110A (The Boeing Company), 55104 (Hydraflow), 55104E1110A (Hydraflow).
There are 12 known substitutes for 4720-01-391-3875: 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 55104E1110A: Material: RUBBER SILICONE CLASS Q LINER; Inside Diameter: 0.500 INCHES NOMINAL FIRST END IN; Operating Pressure: 125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS; Thread Quantity Per Inch: 16 BOTH ENDS. 21 total characteristics are documented in the Federal Logistics Information System.