The Hose Assembly,nonmetallic, cataloged under National Stock Number 4720-01-557-3323, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Hydrasearch Company, Llc. Government technical data includes 20 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4720-01-557-3323 |
| Primary Part Number | 7326639-166 |
| Item Name | Hose Assembly,nonmetallic |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Hydrasearch Company, Llc |
| Status | ACTIVE |
| Measuring Method and Length | 27.000 INCHES NOMINAL WORKING IN |
| Temp Rating | -65.0 FAHRENHEIT AND 400.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Minimum Inside Bending Radius | 3.250 INCHES IN |
| Connection Style | SWIVEL NUT, GASKET SEAL ALL ENDS |
| End Connection Design | STRAIGHT ALL ENDS |
| Layer Composition and Location | OUTER LAYER BRAIDED CORROSION RESISTANT STEEL WIRE |
| Connection Type | THREADED INTERNAL BOSS ALL ENDS |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 0.750 INCHES FIRST END IN |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 0.615 INCHES NOMINAL IN |
| Nominal Thread Size | 1.250 INCHES FIRST END IN |
| Nominal Thread Size | 0.812 INCHES SECOND END IN |
| Inside Diameter | 0.401 INCHES NOMINAL IN |
| Inside Surface Condition | SMOOTH |
| Media for Which Designed | HYDRAULIC FLUID, PHOSPHATE-ESTER BASE SINGLE RESPONSE |
| Thread Class | 2B ALL ENDS |
| Thread Quantity Per Inch | 16 SECOND END |
| Thread Quantity Per Inch | 12 FIRST END |
| Thread Series Designator | UN ALL ENDS |
| 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 |
|---|---|
| 7326639-166 | Hydrasearch Company, Llc (USA) |
| Reference | Meaning |
|---|---|
| 5793194 FIND NO 079 | 5/1 Secondary reference Naval Sea Systems Command |
| 7326639-166 | 3/1 Design control — primary reference Naval Sea Systems Command |
NSN 4720-01-557-3323 is a Hose Assembly,nonmetallic, manufactured by Hydrasearch Company, Llc, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-557-3323 has 1 manufacturer part number on file: 7326639-166 (Hydrasearch Company, Llc).
Key specifications for 7326639-166: Measuring Method and Length: 27.000 INCHES NOMINAL WORKING IN; Temp Rating: -65.0 FAHRENHEIT AND 400.0 FAHRENHEIT SINGLE RESPONSE DEGF; Minimum Inside Bending Radius: 3.250 INCHES IN; Connection Style: SWIVEL NUT, GASKET SEAL ALL ENDS. 20 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.