The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-01-685-8531, 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 Tube Fittings Division. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-685-8531 |
| Primary Part Number | PD331 |
| Item Name | Coupling Half,quick Disconnect |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division |
| Status | ACTIVE |
| Nominal Width Across Flats | 0.69 INCHES IN |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL FIRST FLUID END CONNECTION |
| Connection Style | GROOVED FIRST QUICK DISCONNECT END |
| Connection Type | THREADED INTERNAL BOSS FIRST FLUID END CONNECTION |
| Connection Type | EXTERNAL QUICK DISCONNECT FIRST QUICK DISCONNECT END |
| Operating Pressure | 6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Quick Disconnect Nominal Size | 0.125 INCHES FIRST QUICK DISCONNECT END IN |
| Basic Shape Style | OCTAGON W/OUT BOLT HOLES FIRST QUICK DISCONNECT END |
| Nominal Thread Size | 0.375 INCHES FIRST FLUID END CONNECTION IN |
| Maximum Operating Temp | 250.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Surface Treatment | CHROMATE ZINC BODY |
| Thread Quantity Per Inch | 24 FIRST FLUID END CONNECTION |
| Material | STEEL BODY |
| Thread Series Designator | UNF FIRST FLUID END CONNECTION |
| 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 |
|---|---|
| PD331 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division (USA) |
| Reference | Meaning |
|---|---|
| 4221781 | 7/2 Vendor item drawing reference Oshkosh Defense Llc |
NSN 4730-01-685-8531 is a Coupling Half,quick Disconnect, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-685-8531 has 1 manufacturer part number on file: PD331 (Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division).
Key specifications for PD331: Nominal Width Across Flats: 0.69 INCHES IN; Connection Style: EXTERNAL SEAT FOR GASKET SEAL FIRST FLUID END CONNECTION; Connection Style: GROOVED FIRST QUICK DISCONNECT END; Connection Type: THREADED INTERNAL BOSS FIRST FLUID END CONNECTION. 14 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.