The Hose Assembly,metallic, cataloged under National Stock Number 4720-01-424-9846, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Hyspan Precision Products, Inc.. Government technical data includes 28 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-424-9846 |
| Primary Part Number | 4-BW621-1S-FW-FFW-20 1/4 |
| Item Name | Hose Assembly,metallic |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Hyspan Precision Products, Inc. |
| Status | ACTIVE |
| Measuring Method and Length | 20.250 INCHES NOMINAL OVERALL IN |
| Temp Rating | -68.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Flange Thickness | 0.938 INCHES NOMINAL FIRST END IN |
| Flange Thickness | 0.938 INCHES NOMINAL SECOND END IN |
| Minimum Inside Bending Radius | 23.000 INCHES IN |
| Connection Style | PLAIN FIRST END |
| Connection Style | PLAIN SECOND END |
| Flange Outside Diameter | 9.000 INCHES NOMINAL FIRST END IN |
| Flange Outside Diameter | 9.000 INCHES NOMINAL SECOND END IN |
| End Connection Design | STRAIGHT FIRST END |
| End Connection Design | STRAIGHT SECOND END |
| Layer Composition and Location | OUTER LAYER BRAIDED CORROSION RESISTANT STEEL WIRE |
| Connection Type | PLAIN FACE FLANGE FIRST END |
| Connection Type | PLAIN FACE FLANGE SECOND END |
| Bolt Hole Diameter | 0.750 INCHES NOMINAL SECOND END IN |
| Bolt Hole Diameter | 0.750 INCHES NOMINAL FIRST END IN |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 5.265 INCHES MAXIMUM IN |
| Inside Diameter | 4.000 INCHES NOMINAL IN |
| Bolt Hole Quantity | 8 SECOND END |
| Bolt Hole Quantity | 4 FIRST END |
| Bolt Circle Diameter | 7.500 INCHES NOMINAL FIRST END IN |
| Bolt Circle Diameter | 7.500 INCHES NOMINAL SECOND END IN |
| Hydrostatic Test Pressure | 300.0 POUNDS PER SQUARE INCH LBS |
| Burst Test Pressure | 600.0 POUNDS PER SQUARE INCH LBS |
| Flange Style | ROUND W / BOLT HOLES FIRST END |
| Flange Style | ROUND W / BOLT HOLES SECOND END |
| End Flange Construction | SOLID SECOND END |
| 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 |
|---|---|
| 4-BW621-1S-FW-FFW-20 1/4 PRIMARY | Hyspan Precision Products, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 4-BW621-1S-FW-FWW-20-1/4 | 5/9 Secondary reference Hyspan Precision Products, Inc. |
NSN 4720-01-424-9846 is a Hose Assembly,metallic, manufactured by Hyspan Precision Products, Inc., classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-424-9846 has 1 manufacturer part number on file: 4-BW621-1S-FW-FFW-20 1/4 (Hyspan Precision Products, Inc.).
Key specifications for 4-BW621-1S-FW-FFW-20 1/4: Measuring Method and Length: 20.250 INCHES NOMINAL OVERALL IN; Temp Rating: -68.0 FAHRENHEIT SINGLE RESPONSE DEGF; Flange Thickness: 0.938 INCHES NOMINAL FIRST END IN; Flange Thickness: 0.938 INCHES NOMINAL SECOND END IN. 28 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.