The Bolt,fluid Passage, cataloged under National Stock Number 4730-01-459-3191, 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 22 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-459-3191 |
| Item Name | Bolt,fluid Passage |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| First End Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Width Across Flats | 1.625 INCHES NOMINAL IN |
| First End Thread Direction | RIGHT-HAND |
| Length From Bearing Surface of Wrenching Feature to End of First Diameter | 3.375 INCHES NOMINAL IN |
| Body Style | PLAIN |
| First End Thread Class | 2A A |
| First End Style Designator | FLARED |
| Concentric Hole Depth | 3.695 INCHES NOMINAL IN |
| Wrenching Feature Height | 0.625 INCHES NOMINAL IN |
| First End Thread Length | 9.000 INCHES NOMINAL IN |
| Wrenching Feature Style | OCTAGON |
| Length From Bearing Surface of Wrenching Feature to End of Second Diameter | 4.5625 INCHES NOMINAL IN |
| First End Seat Angle | 30.0 DEGREES NOMINAL |
| Length From Bearing Surface of Wrenching Feature to Bolt End | 4.625 INCHES NOMINAL IN |
| Second End Seat Radius | 0.405 INCHES NOMINAL IN |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Concentric Hole Diameter | 0.242 INCHES MINIMUM AND 0.245 INCHES MAXIMUM IN |
| First Radial Fluid Hole Diameter | 0.375 INCHES NOMINAL IN |
| Distance From First Radial Hole Center to End of Bolt | 3.695 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| First Diameter From Wrenching Feature | 0.250 INCHES NOMINAL IN |
| First End Nominal Thread Size | 0.875 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 |
|---|---|
| 703-1554057 P/N 21 | 3/2 Design control — primary reference U.S. Government activity |
| 1554057 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-459-3191 is a Bolt,fluid Passage, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
5 possible matches (shared part number, not a government interchangeability claim): 2040-01-463-2547, 2040-01-463-2576, 2040-01-463-2754. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-459-3191: First End Thread Series Designator: UNIFIED NATIONAL COARSE (UNC); Width Across Flats: 1.625 INCHES NOMINAL IN; First End Thread Direction: RIGHT-HAND; Length From Bearing Surface of Wrenching Feature to End of First Diameter: 3.375 INCHES NOMINAL IN. 22 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.