The Nut,tube Coupling, cataloged under National Stock Number 4730-00-775-9709, 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 Div Instrumentation Products Division. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-775-9709 |
| Primary Part Number | 6-NU6-316 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Parker-Hannifin Corporation Div Instrumentation Products Division |
| Status | ACTIVE |
| Width Across Flats | 0.688 INCHES NOMINAL IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.562 INCHES IN |
| Nut Height | 0.562 INCHES NOMINAL IN |
| Nut Style | TUBE COUPLING |
| Thread Class | 3B |
| Thread Quantity Per Inch | 18 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Smallest Inside Diameter | 0.375 INCHES NOMINAL IN |
| Nominal Tube Outside Diameter | 0.375 INCHES IN |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY FREE FROM MERCURY CONTAMINATION REQUIREMENT |
| 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 |
|---|---|
| 6-NU6-316 | Parker-Hannifin Corporation Div Instrumentation Products Division (USA) |
| Reference | Meaning |
|---|---|
| SS-602-1 | 3/1 Design control — primary reference Swagelok Co |
| 602-1-316 | 5/9 Secondary reference Swagelok Co |
NSN 4730-00-775-9709 is a Nut,tube Coupling, manufactured by Parker-Hannifin Corporation Div Instrumentation Products Division, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-775-9709 has 1 manufacturer part number on file: 6-NU6-316 (Parker-Hannifin Corporation Div Instrumentation Products Division).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-057-3762. Verify interchangeability with system specifications before substitution.
Key specifications for 6-NU6-316: Width Across Flats: 0.688 INCHES NOMINAL IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.562 INCHES IN. 12 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.