The Nut,tube Coupling, cataloged under National Stock Number 4730-00-720-1104, 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 Mission Systems Orchard Park Inc. Government technical data includes 15 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-720-1104 |
| Primary Part Number | PA921-5CG |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Mission Systems Orchard Park Inc |
| Status | ACTIVE |
| Length to Shoulder | 0.590 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN |
| Width Across Flats | 0.590 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Thread Series | UNF |
| Seat Angle | 45.0 DEGREES NOMINAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Nut Height | 0.730 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OR ZINC OVERALL |
| Nut Style | TUBE COUPLING |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | STEEL CORROSION RESISTING OR STEEL OVERALL |
| Fabrication Method | MACHINED |
| Smallest Inside Diameter | 0.359 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Nominal Tube Outside Diameter | 0.312 INCHES IN |
| 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 |
|---|---|
| PA921-5CG PRIMARY | Mission Systems Orchard Park Inc (USA) |
| PA921-5CG | Mil-Craft Mfg., Inc. (USA) |
| Reference | Meaning |
|---|---|
| PA921-5CG | 5/9 Secondary reference Ingersoll-Rand Company Dba Ingersoll-Rand |
| PA921-5CG | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters |
| PA921-CG | 5/9 Secondary reference Parker Hannifin Corp Stratoflex Div Aircraft Fittings Opn |
NSN 4730-00-720-1104 is a Nut,tube Coupling, manufactured by Mission Systems Orchard Park Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-720-1104 has 2 manufacturer part numbers on file: PA921-5CG (Mission Systems Orchard Park Inc), PA921-5CG (Mil-Craft Mfg., Inc.).
Key specifications for PA921-5CG: Length to Shoulder: 0.590 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN; Width Across Flats: 0.590 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN; Thread Series: UNF; Seat Angle: 45.0 DEGREES NOMINAL. 15 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.