The Hose Assembly,nonmetallic, cataloged under National Stock Number 4720-01-255-5318, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 30 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 4720-01-255-5318 |
| Item Name | Hose Assembly,nonmetallic |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Status | ACTIVE |
| Flow Angle | 45.0 DEGREES FIRST END |
| Measuring Method and Length | 57.000 INCHES NOMINAL OVERALL IN |
| Temp Rating | -65.0 FAHRENHEIT AND 300.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Flange Thickness | 0.234 INCHES NOMINAL SECOND END IN |
| Minimum Inside Bending Radius | 8.000 INCHES IN |
| Connection Style | SWIVEL NUT FLARE FIRST END |
| Connection Style | RAISED SECOND END |
| End Connection Design | STRAIGHT SECOND END |
| End Connection Design | ELBOW FIRST END |
| Layer Composition and Location | 1ST LAYER BRAIDED CORROSION RESISTANT STEEL WIRE, PARTIAL COVERAGE AND OUTER LAYER BRAIDED CORROSION RESISTANT STEEL WIRE |
| Connection Type | THREADED INTERNAL TUBE FIRST END |
| Connection Type | RAISED FACE FLANGE SECOND END |
| Bolt Hole Diameter | 0.266 INCHES NOMINAL SECOND END IN |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 1.437 INCHES NOMINAL IN |
| Operating Pressure | 500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS |
| Features Provided | REUSABLE END FITTINGS |
| Flange Length | 2.188 INCHES NOMINAL SECOND END IN |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 1.625 INCHES FIRST END IN |
| Seat Angle | 37.0 DEGREES FIRST END |
| Specification/standard Data | 81349-MIL-H-83797 GOVERNMENT SPECIFICATION |
| Nondefinitive Spec/std Data | 20 SIZE |
| Inside Diameter | 1.250 INCHES NOMINAL IN |
| Inside Surface Condition | SMOOTH |
| Bolt Hole Quantity | 4 SECOND END |
| Center to Center Distance Between Bolt Holes Along Length | 1.656 INCHES NOMINAL SECOND END IN |
| Raised Face Diameter | 1.854 INCHES NOMINAL SECOND END IN |
| Raised Face Height | 0.063 INCHES NOMINAL SECOND END IN |
| Center to Center Distance Between Bolt Holes Along Width | 1.656 INCHES NOMINAL SECOND END IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MIL-DTL-83796/5 | 4/1 Identification reference U.S. Government activity |
| AE1011043N0570 | 5/1 Secondary reference Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
| M83796/5N570N00 | 2/2 Government specification standardization U.S. Government activity |
| M83796/5N570N | 5/9 Secondary reference U.S. Government activity |
| SS43 | D/9 Drawing number reference only Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
NSN 4720-01-255-5318 is a Hose Assembly,nonmetallic, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
5 possible matches (shared part number, not a government interchangeability claim): 4720-01-298-4380, 4720-01-311-8373, 4720-01-312-7300. Verify interchangeability with system specifications before substitution.
Key specifications for 4720-01-255-5318: Flow Angle: 45.0 DEGREES FIRST END; Measuring Method and Length: 57.000 INCHES NOMINAL OVERALL IN; Temp Rating: -65.0 FAHRENHEIT AND 300.0 FAHRENHEIT SINGLE RESPONSE DEGF; Flange Thickness: 0.234 INCHES NOMINAL SECOND END IN. 30 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.