The Nut,tube Coupling, cataloged under National Stock Number 4730-01-356-3518, 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 Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 15 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 | 4730-01-356-3518 |
| Primary Part Number | 50FC-524 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Length to Shoulder | 0.150 INCHES MINIMUM IN |
| Width Across Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Thread Tolerance Class | 6H INTERNAL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Seat Angle | 45.0 DEGREES NOMINAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES IN |
| Nut Height | 0.561 INCHES MINIMUM IN |
| Nut Style | TUBE COUPLING |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Fabrication Method | MACHINED |
| Smallest Inside Diameter | 0.356 INCHES MAXIMUM IN |
| Nominal Tube Outside Diameter | 0.125 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 |
|---|---|
| 50FC-524 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
NSN 4730-01-356-3518 is a Nut,tube Coupling, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-356-3518 has 1 manufacturer part number on file: 50FC-524 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for 50FC-524: Length to Shoulder: 0.150 INCHES MINIMUM IN; Width Across Flats: 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN; Thread Tolerance Class: 6H INTERNAL; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 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.