The Hose Assembly,nonmetallic, cataloged under National Stock Number 4720-01-321-8271, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Appleton Marine 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-321-8271 |
| Primary Part Number | 77C-20-10671-20-16A71-20-S-145 |
| Item Name | Hose Assembly,nonmetallic |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Appleton Marine Inc |
| Status | ACTIVE |
| Measuring Method and Length | 145.000 INCHES NOMINAL OVERALL IN |
| Temp Rating | -40.0 FAHRENHEIT AND 250.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Minimum Inside Bending Radius | 16.500 INCHES IN |
| Connection Style | PLAIN SECOND END |
| Connection Style | SWIVEL NUT FLARE FIRST END |
| Flange Outside Diameter | 2.000 INCHES NOMINAL SECOND END IN |
| End Connection Design | STRAIGHT FIRST END |
| End Connection Design | STRAIGHT SECOND END |
| Layer Composition and Location | 1ST LAYER SPIRALLY WRAPPED CORROSION RESISTANT STEEL FABRIC AND 2ND LAYER SPIRALLY WRAPPED CORROSION RESISTANT STEEL FABRIC AND 3RD LAYER SPIRALLY WRAPPED CORROSION RESISTANT STEEL FABRIC AND 4TH LAYER SPIRALLY WRAPPED CORROSION RESISTANT STEEL FABRIC AND OUTER LAYER MOLDED RUBBER, SYNTHETIC |
| Connection Type | PLAIN FACE FLANGE SECOND END |
| Connection Type | THREADED INTERNAL TUBE FIRST END |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 1.850 INCHES NOMINAL IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS |
| Features Provided | NONSKIVE |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 1.625 INCHES FIRST END IN |
| Seat Angle | 37.0 DEGREES FIRST END |
| Exterior Color | GRAY/GREY |
| Inside Diameter | 1.250 INCHES NOMINAL IN |
| Inside Surface Condition | SMOOTH |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| Hydrostatic Test Pressure | 6000.0 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3B FIRST END |
| Burst Test Pressure | 12000.0 POUNDS PER SQUARE INCH LBS |
| Thread Series Designator | UNEF FIRST END |
| Flange Style | ROUND W/ OUT 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 |
|---|---|
| 77C-20-10671-20-16A71-20-S-145 PRIMARY | Appleton Marine Inc (USA) |
| Reference | Meaning |
|---|---|
| 77C066A202020145 | 5/9 Secondary reference U.S. Government activity |
| F77C066A-20-20-20-145.00 | 5/9 Secondary reference U.S. Government activity |
| F77C066A-20-20-20-145.00 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4720-01-321-8271 is a Hose Assembly,nonmetallic, manufactured by Appleton Marine Inc, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-321-8271 has 1 manufacturer part number on file: 77C-20-10671-20-16A71-20-S-145 (Appleton Marine Inc).
Key specifications for 77C-20-10671-20-16A71-20-S-145: Measuring Method and Length: 145.000 INCHES NOMINAL OVERALL IN; Temp Rating: -40.0 FAHRENHEIT AND 250.0 FAHRENHEIT SINGLE RESPONSE DEGF; Minimum Inside Bending Radius: 16.500 INCHES IN; Connection Style: PLAIN SECOND END. 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.