The Hose Assembly,metallic, cataloged under National Stock Number 4720-00-535-0749, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Heil Environmental Industries. Government technical data includes 18 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-00-535-0749 |
| Primary Part Number | 57B238-2 |
| Item Name | Hose Assembly,metallic |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Heil Environmental Industries |
| Status | ACTIVE |
| Measuring Method and Length | 10.500 INCHES NOMINAL OVERALL IN |
| Flange Thickness | 0.375 INCHES NOMINAL FIRST END IN |
| Connection Style | PLAIN FIRST END |
| Flange Outside Diameter | 6.625 INCHES NOMINAL FIRST END IN |
| End Connection Design | STRAIGHT FIRST END |
| Layer Composition and Location | OUTER LAYER CORRUGATED STEEL |
| Connection Type | PLAIN FACE FLANGE FIRST END |
| Bolt Hole Diameter | 0.438 INCHES NOMINAL FIRST END IN |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 4.750 INCHES NOMINAL IN |
| Features Provided | IDENTICAL ENDS |
| Exterior Color | NATURAL |
| Inside Diameter | 4.000 INCHES NOMINAL IN |
| Bolt Hole Quantity | 8 FIRST END |
| Bolt Circle Diameter | 5.875 INCHES NOMINAL FIRST END IN |
| Flange Style | ROUND W / BOLT HOLES FIRST END |
| End Flange Construction | SOLID FIRST END |
| Inner Conveying Tube Style | ANNULAR CLOSE-PITCH CORRUGATED |
| 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 |
|---|---|
| 57B238-2 PRIMARY | Heil Environmental Industries (USA) |
NSN 4720-00-535-0749 is a Hose Assembly,metallic, manufactured by Heil Environmental Industries, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-00-535-0749 has 1 manufacturer part number on file: 57B238-2 (Heil Environmental Industries).
Key specifications for 57B238-2: Measuring Method and Length: 10.500 INCHES NOMINAL OVERALL IN; Flange Thickness: 0.375 INCHES NOMINAL FIRST END IN; Connection Style: PLAIN FIRST END; Flange Outside Diameter: 6.625 INCHES NOMINAL FIRST END IN. 18 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.