The Coupling Body,tube, cataloged under National Stock Number 4730-01-301-0422, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-01-301-0422 |
| Primary Part Number | 1551AS778-1 |
| Item Name | Coupling Body,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Tube Outside Diameter for Which Designed | 0.250 INCHES NOMINAL IN |
| Style Designator | COUPLING BODY |
| Material | STEEL COMP 303 |
| 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 |
|---|---|
| 1551AS778-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| SS-401-PC-BL | 5/9 Secondary reference Swagelok Co |
| 1551AS778 | 5/1 Secondary reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| SS-401-PC-BLBQ | 3/1 Design control — primary reference Swagelok Co |
NSN 4730-01-301-0422 is a Coupling Body,tube, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-301-0422 has 1 manufacturer part number on file: 1551AS778-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 1551AS778-1: Tube Outside Diameter for Which Designed: 0.250 INCHES NOMINAL IN; Style Designator: COUPLING BODY; Overall Length: 0.969 INCHES NOMINAL IN; Special Features: SPECIAL CLEANING FOR OXYGEN SERVICE IAW MIL-C-52211. 3 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.