The Bolt,fluid Passage, cataloged under National Stock Number 4730-00-003-5373, 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 29 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-003-5373 |
| 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 | 1.500 INCHES NOMINAL IN |
| First End Thread Direction | RIGHT-HAND |
| Second End Nominal Thread Size | 0.250 INCHES IN |
| Length From Bearing Surface of Wrenching Feature to End of First Diameter | 4.250 INCHES NOMINAL IN |
| Body Style | SHOULDER |
| First End Thread Class | 3A A |
| Cotter Pin Hole Diameter | 0.156 INCHES NOMINAL IN |
| First End Thread Quantity Per Inch | 12 |
| First End Style Designator | FLARED |
| Second Diameter From Wrenching Feature | 0.896 INCHES NOMINAL IN |
| Concentric Hole Depth | 2.750 INCHES NOMINAL IN |
| Wrenching Feature Height | 0.625 INCHES NOMINAL IN |
| Second End Thread Series Designator | NPT |
| First End Thread Length | 1.031 INCHES NOMINAL IN |
| Wrenching Feature Style | HEXAGON |
| Second End Thread Direction | RIGHT-HAND |
| Length From Bearing Surface of Wrenching Feature to End of Second Diameter | 4.343 INCHES NOMINAL IN |
| First End Seat Angle | 12.0 DEGREES NOMINAL |
| Second End Style Designator | PLAIN |
| Length From Bearing Surface of Wrenching Feature to Bolt End | 5.375 INCHES NOMINAL IN |
| Concentric Hole Diameter | 0.125 INCHES NOMINAL IN |
| Distance From Bolt End to Hole Center | 0.281 INCHES NOMINAL IN |
| First Radial Fluid Hole Diameter | 0.125 INCHES NOMINAL IN |
| Distance From First Radial Hole Center to End of Bolt | 3.250 INCHES NOMINAL IN |
| Material | NICKEL ALLOY |
| Second End Thread Length | 0.250 INCHES NOMINAL IN |
| First Diameter From Wrenching Feature | 1.242 INCHES MINIMUM AND 1.246 INCHES MAXIMUM IN |
| First End Nominal Thread Size | 1.000 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 |
|---|---|
| 421027-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-00-003-5373 is a Bolt,fluid Passage, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5999-01-314-7418. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-00-003-5373: First End Thread Series Designator: UNF; Width Across Flats: 1.500 INCHES NOMINAL IN; First End Thread Direction: RIGHT-HAND; Second End Nominal Thread Size: 0.250 INCHES IN. 29 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.