The Bolt,fluid Passage, cataloged under National Stock Number 4730-00-021-7903, 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 26 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-021-7903 |
| 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 | 0.167 INCHES NOMINAL IN |
| Third Diameter From Wrenching Feature | 0.559 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN |
| First End Thread Class | 3A A |
| First End Style Designator | PLAIN |
| Length From Bearing Surface of Wrenching Feature to End of Third Diameter | 0.380 INCHES NOMINAL IN |
| Second Diameter From Wrenching Feature | 0.384 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Concentric Hole Depth | 1.200 INCHES NOMINAL IN |
| Wrenching Feature Height | 0.180 INCHES NOMINAL IN |
| First End Thread Length | 0.340 INCHES NOMINAL IN |
| Wrenching Feature Style | HEXAGON |
| Material Document and Classification | QQ-A-268 T4 FED SPEC SINGLE MATERIAL RESPONSE |
| Length From Bearing Surface of Wrenching Feature to End of Second Diameter | 0.310 INCHES NOMINAL IN |
| Length From Bearing Surface of Wrenching Feature to Bolt End | 1.440 INCHES NOMINAL IN |
| Concentric Hole Diameter | 0.172 INCHES MINIMUM AND 0.178 INCHES MAXIMUM IN |
| First Radial Fluid Hole Diameter | 0.172 INCHES MINIMUM AND 0.178 INCHES MAXIMUM IN |
| Length From Bearing Surface of Wrenching Feature to End of Fourth Diameter | 0.570 INCHES NOMINAL IN |
| Distance From First Radial Hole Center to End of Bolt | 1.130 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 2024 |
| Fifth Diameter From Wrenching Feature | 0.559 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN |
| Length From Bearing Surface of Wrenching Feature to End of Fifth Diameter | 0.640 INCHES NOMINAL IN |
| First Diameter From Wrenching Feature | 0.559 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN |
| First End Nominal Thread Size | 0.438 INCHES IN |
| Fourth Diameter From Wrenching Feature | 0.380 INCHES NOMINAL 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 |
|---|---|
| 3H20034-101 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-00-021-7903 is a Bolt,fluid Passage, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-00-021-7903: 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: 0.167 INCHES NOMINAL IN. 26 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.