The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-01-656-0507, 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 Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division. Government technical data includes 13 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-656-0507 |
| Primary Part Number | HF-251-4PL-S |
| Item Name | Coupling Half,quick Disconnect |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division |
| Status | ACTIVE |
| Nominal Width Across Flats | 0.81 INCHES IN |
| Nominal Pipe Size Accommodated | 0.25 INCHES ALL ENDS IN |
| Connection Style | BARBED OR SERRATED END SECOND QUICK DISCONNECT END |
| Nominal Length | 2.64 INCHES IN |
| Connection Type | AIR CHUCK QUICK DISCONNECT FIRST QUICK DISCONNECT END |
| Style Designator | FEMALE COUPLING HALF |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Leg Length | 2.64 INCHES NOMINAL IN |
| Basic Shape Style | ROUND ALL ENDS |
| Nominal Width | 0.99 INCHES IN |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Material | STEEL AND COPPER ALLOY BODY |
| Material | STEEL CORROSION RESISTING BALL BEARING |
| 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 |
|---|---|
| HF-251-4PL-S PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division (USA) |
NSN 4730-01-656-0507 is a Coupling Half,quick Disconnect, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-656-0507 has 1 manufacturer part number on file: HF-251-4PL-S (Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division).
Key specifications for HF-251-4PL-S: Nominal Width Across Flats: 0.81 INCHES IN; Nominal Pipe Size Accommodated: 0.25 INCHES ALL ENDS IN; Connection Style: BARBED OR SERRATED END SECOND QUICK DISCONNECT END; Nominal Length: 2.64 INCHES IN. 13 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.