The Hose Assembly,nonmetallic, cataloged under National Stock Number 4720-01-502-4570, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-502-4570 |
| Primary Part Number | 7326639-250 |
| Item Name | Hose Assembly,nonmetallic |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
| Status | ACTIVE |
| Measuring Method and Length | 108.000 INCHES NOMINAL OVERALL IN |
| Nominal Inside Diameter Hose Accommodated | 0.250 INCHES FIRST END IN |
| Nominal Inside Diameter Hose Accommodated | 0.250 INCHES SECOND END IN |
| End Connection Design | STRAIGHT FIRST END |
| End Connection Design | STRAIGHT SECOND END |
| Connection Type | UNTHREADED EXTERNAL HOSE SECOND END |
| Connection Type | THREADED INTERNAL TUBE FIRST END |
| Cross-Sectional Shape Style | ROUND |
| Operating Pressure | 2500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS |
| Seat Angle | 37.0 DEGREES FIRST END |
| Inside Surface Condition | SMOOTH |
| Media for Which Designed | HYDRAULIC FLUID SINGLE RESPONSE |
| Hydrostatic Test Pressure | 10000.0 POUNDS PER SQUARE INCH LBS |
| 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 |
|---|---|
| 7326639-250 | Hydrasearch Company, Llc (USA) |
| 7326639-250 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA) |
| 6395223 FIND 41 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 505-7326639 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4720-01-502-4570 is a Hose Assembly,nonmetallic, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-502-4570 has 3 manufacturer part numbers on file: 7326639-250 (Hydrasearch Company, Llc), 7326639-250 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp), 6395223 FIND 41 (Naval Sea Systems Command).
4 possible matches (shared part number, not a government interchangeability claim): 4720-01-502-7027, 4720-01-502-7330, 4720-01-502-7597. Verify interchangeability with system specifications before substitution.
Key specifications for 7326639-250: Measuring Method and Length: 108.000 INCHES NOMINAL OVERALL IN; Nominal Inside Diameter Hose Accommodated: 0.250 INCHES FIRST END IN; Nominal Inside Diameter Hose Accommodated: 0.250 INCHES SECOND END IN; End Connection Design: STRAIGHT FIRST END. 13 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.