The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-01-280-8346, 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 Palumbo Bros. Government technical data includes 8 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-280-8346 |
| Primary Part Number | 633A-0180 |
| Item Name | Coupling Half,quick Disconnect |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Palumbo Bros |
| Status | ACTIVE |
| Connection Style | PLAIN ALL ENDS |
| Connection Type | THREADED INTERNAL PIPE FIRST FLUID END CONNECTION |
| Connection Type | EXTERNAL QUICK DISCONNECT ALL ENDS |
| Style Designator | MALE COUPLING HALF |
| Nominal Thread Size | 4.000 INCHES ALL ENDS IN |
| Material | ALUMINUM ALLOY BODY |
| Quick Disconnect Method | CAM-LOCKING ALL ENDS |
| Thread Series Designator | NPT ALL ENDS |
| 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 |
|---|---|
| 633A-0180 PRIMARY | Palumbo Bros (USA) |
| Reference | Meaning |
|---|---|
| 633-A4 | 5/9 Secondary reference U.S. Government activity |
| 633-A4 | 5/9 Secondary reference Dover Resources Inc Dba Opw Engineered Systems |
| 633A0180 | 5/9 Secondary reference U.S. Government activity |
| 633A0180 | 5/9 Secondary reference Dover Resources Inc Dba Opw Engineered Systems |
| 633A0180 | 5/9 Secondary reference Pride Cast Metals, Inc. |
NSN 4730-01-280-8346 is a Coupling Half,quick Disconnect, manufactured by Palumbo Bros, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-280-8346 has 1 manufacturer part number on file: 633A-0180 (Palumbo Bros).
Key specifications for 633A-0180: Connection Style: PLAIN ALL ENDS; Connection Type: THREADED INTERNAL PIPE FIRST FLUID END CONNECTION; Connection Type: EXTERNAL QUICK DISCONNECT ALL ENDS; Style Designator: MALE COUPLING HALF. 8 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.