The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-01-335-0385, 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 Inventory Control Point Mechanicsburg. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-335-0385 |
| Primary Part Number | 1551AS474-1CP |
| Item Name | Coupling Half,quick Disconnect |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Style Designator | MALE COUPLING HALF |
| Leg Length | 3.550 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING BODY |
| Reference Number Differentiating Characteristics | CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 1551AS474-1CP | Naval Inventory Control Point Mechanicsburg (USA) |
| SS-QT4-B1-400CP | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 1551AS474-1 | 7/1 Vendor item drawing reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| SS-QT4-B1-400 | 3/1 Design control — primary reference Swagelok Co |
NSN 4730-01-335-0385 is a Coupling Half,quick Disconnect, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-335-0385 has 2 manufacturer part numbers on file: 1551AS474-1CP (Naval Inventory Control Point Mechanicsburg), SS-QT4-B1-400CP (Naval Inventory Control Point Mechanicsburg).
Key specifications for 1551AS474-1CP: Criticality Code Justification: ZZZY; Style Designator: MALE COUPLING HALF; Overall Length: 4.640 INCHES NOMINAL IN; Leg Length: 3.550 INCHES NOMINAL IN. 5 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.