The Hose Assembly,nonmetallic, cataloged under National Stock Number 4720-01-508-3733, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 24 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-508-3733 |
| Primary Part Number | 532-7286798-F257 |
| Item Name | Hose Assembly,nonmetallic |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Measuring Method and Length | 46.200 INCHES NOMINAL OVERALL IN |
| Temp Rating | -40.0 FAHRENHEIT AND 200.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Minimum Inside Bending Radius | 13.250 INCHES IN |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END |
| End Connection Design | STRAIGHT FIRST END |
| Criticality Code Justification | FEAT |
| Layer Composition and Location | 1ST LAYER BRAIDED POLYESTER CORD AND 2ND LAYER BRAIDED POLYESTER CORD AND OUTER LAYER MOLDED RUBBER, SYNTHETIC |
| Connection Type | THREADED EXTERNAL BOSS FIRST END |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 2.172 INCHES MINIMUM AND 2.266 INCHES MAXIMUM IN |
| Operating Pressure | 350.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS |
| End Fitting Component and Material | COMPLETE FITTING COPPER ALLOY ALL ENDS |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 3.0625 INCHES FIRST END IN |
| Specification/standard Data | MIL-H-24136/3 -32 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION |
| Inside Diameter | 1.812 INCHES MINIMUM AND 1.857 INCHES MAXIMUM IN |
| Inside Surface Condition | SMOOTH |
| Media for Which Designed | HYDRAULIC FLUID SINGLE RESPONSE |
| Hydrostatic Test Pressure | 700.0 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A FIRST END A |
| Burst Test Pressure | 1400.0 POUNDS PER SQUARE INCH LBS |
| Thread Quantity Per Inch | 12 FIRST END |
| Outer Covering Environmental Protection | ABRASION RESISTANT AND OXIDATION RESISTANT AND LIGHT RESISTANT AND WEATHERPROOF |
| Thread Series Designator | UN FIRST END |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 532-7286798-F257 PRIMARY | Naval Sea Systems Command (USA) |
| 801-6640963 ASSY 83 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H659-2204-F257 | 5/2 Secondary reference U.S. Government activity |
| 2633-225-01 ASSY 83 | 5/2 Secondary reference U.S. Government activity |
| 6640963 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4720-01-508-3733 is a Hose Assembly,nonmetallic, manufactured by Naval Sea Systems Command, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-508-3733 has 2 manufacturer part numbers on file: 532-7286798-F257 (Naval Sea Systems Command), 801-6640963 ASSY 83 (Naval Sea Systems Command).
Key specifications for 532-7286798-F257: Measuring Method and Length: 46.200 INCHES NOMINAL OVERALL IN; Temp Rating: -40.0 FAHRENHEIT AND 200.0 FAHRENHEIT SINGLE RESPONSE DEGF; Minimum Inside Bending Radius: 13.250 INCHES IN; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END. 24 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.