The Hose Assembly,nonmetallic, cataloged under National Stock Number 4720-00-043-3745, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Ritchie Engineering Co Inc. Government technical data includes 26 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-00-043-3745 |
| Primary Part Number | HA120 |
| Item Name | Hose Assembly,nonmetallic |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Ritchie Engineering Co Inc |
| Status | ACTIVE |
| Flow Angle | 45.0 DEGREES SECOND END |
| Measuring Method and Length | 120.000 INCHES NOMINAL OVERALL IN |
| Temp Rating | -20.0 FAHRENHEIT AND 250.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Connection Style | FLARE FIRST END |
| Connection Style | FLARE SECOND END |
| Layer Composition and Location | OUTER LAYER MOLDED RUBBER |
| Connection Type | THREADED INTERNAL TUBE SECOND END |
| Connection Type | THREADED INTERNAL TUBE FIRST END |
| Cross-Sectional Shape Style | ROUND |
| Operating Pressure | 500.0 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 SECOND END |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.250 INCHES FIRST END IN |
| Nominal Thread Size | 0.250 INCHES SECOND END IN |
| Seat Angle | 37.0 DEGREES FIRST END |
| Seat Angle | 37.0 DEGREES SECOND END |
| Exterior Color | YELLOW |
| Inside Diameter | 0.188 INCHES NOMINAL IN |
| Inside Surface Condition | SMOOTH |
| Media for Which Designed | REFRIGERANT 12 SINGLE RESPONSE |
| Thread Class | 2B FIRST END |
| Thread Class | 2B SECOND END |
| Burst Test Pressure | 2500.0 POUNDS PER SQUARE INCH LBS |
| Thread Series Designator | UNF FIRST END |
| Thread Series Designator | UNF 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 |
NSN 4720-00-043-3745 is a Hose Assembly,nonmetallic, manufactured by Ritchie Engineering Co Inc, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-00-043-3745 has 2 manufacturer part numbers on file: HA120 (Ritchie Engineering Co Inc), HAV-120 (Ritchie Engineering Co Inc).
1 possible match (shared part number, not a government interchangeability claim): 3120-00-817-5081. Verify interchangeability with system specifications before substitution.
Key specifications for HA120: Flow Angle: 45.0 DEGREES SECOND END; Measuring Method and Length: 120.000 INCHES NOMINAL OVERALL IN; Temp Rating: -20.0 FAHRENHEIT AND 250.0 FAHRENHEIT SINGLE RESPONSE DEGF; Connection Style: FLARE FIRST END. 26 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.