The Bolt,fluid Passage, cataloged under National Stock Number 4730-01-239-0251, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-239-0251 |
| Item Name | Bolt,fluid Passage |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| First End Thread Series Designator | UNF |
| Width Across Flats | 0.750 INCHES NOMINAL IN |
| First End Thread Direction | RIGHT-HAND |
| Length From Bearing Surface of Wrenching Feature to End of First Diameter | 3.940 INCHES NOMINAL IN |
| First End Thread Class | 3A A |
| First End Style Designator | PLAIN |
| Concentric Hole Depth | 4.395 INCHES NOMINAL IN |
| Wrenching Feature Height | 0.190 INCHES NOMINAL IN |
| First End Thread Length | 0.266 INCHES NOMINAL IN |
| Wrenching Feature Style | HEXAGON |
| Length From Bearing Surface of Wrenching Feature to Bolt End | 4.205 INCHES NOMINAL IN |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Concentric Hole Diameter | 0.422 INCHES NOMINAL IN |
| Surface Treatment | LACQUER |
| First Radial Fluid Hole Diameter | 0.125 INCHES NOMINAL IN |
| Distance From First Radial Hole Center to End of Bolt | 3.565 INCHES NOMINAL IN |
| Material | STEEL COMP 17-4PH |
| First Diameter From Wrenching Feature | 0.497 INCHES NOMINAL IN |
| First End Nominal Thread Size | 0.500 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 |
| Reference | Meaning |
|---|---|
| 3307519-1 | 3/2 Design control — primary reference U.S. Government activity |
| 3307519-1 | D/9 Drawing number reference only U.S. Government activity |
| 3307519-1 | 5/9 Secondary reference Societe Nationale De Construction Aerospatiale S.a Dba Sonaca |
| 3307519 | 3/1 Design control — primary reference U.S. Government activity |
NSN 4730-01-239-0251 is a Bolt,fluid Passage, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-239-0251: First End Thread Series Designator: UNF; Width Across Flats: 0.750 INCHES NOMINAL IN; First End Thread Direction: RIGHT-HAND; Length From Bearing Surface of Wrenching Feature to End of First Diameter: 3.940 INCHES NOMINAL IN. 19 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.