The Bolt,fluid Passage, cataloged under National Stock Number 4730-00-537-2805, 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 24 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4730-00-537-2805 |
| Item Name | Bolt,fluid Passage |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| First End Thread Series Designator | UNF |
| First End Thread Direction | RIGHT-HAND |
| Length From Bearing Surface of Wrenching Feature to End of First Diameter | 0.140 INCHES MINIMUM AND 0.142 INCHES MAXIMUM IN |
| Third Diameter From Wrenching Feature | 0.480 INCHES MINIMUM AND 0.485 INCHES MAXIMUM IN |
| Body Style | BODY WRENCHING |
| First End Thread Class | 2A A |
| First End Thread Quantity Per Inch | 18 |
| First End Style Designator | FLARED |
| Length From Bearing Surface of Wrenching Feature to End of Third Diameter | 1.083 INCHES NOMINAL IN |
| Second Diameter From Wrenching Feature | 0.5590 INCHES MINIMUM AND 0.5600 INCHES MAXIMUM IN |
| First End Thread Length | 0.290 INCHES NOMINAL IN |
| Wrenching Feature Style | HEXAGON |
| Material Document and Classification | MIL-S-5626 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE |
| Length From Bearing Surface of Wrenching Feature to End of Second Diameter | 0.963 INCHES MINIMUM AND 0.973 INCHES MAXIMUM IN |
| Second End Style Designator | FLARED |
| Length From Bearing Surface of Wrenching Feature to Bolt End | 1.343 INCHES NOMINAL IN |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Concentric Hole Diameter | 0.276 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN |
| First Radial Fluid Hole Diameter | 0.250 INCHES NOMINAL IN |
| Distance From First Radial Hole Center to End of Bolt | 0.859 INCHES NOMINAL IN |
| Material | STEEL COMP 4140 OR STEEL COMP 4130 OR STEEL COMP 8740 |
| Second End Connection Type | THREADED EXTERNAL TUBE |
| First Diameter From Wrenching Feature | 0.3834 INCHES MINIMUM AND 0.3850 INCHES MAXIMUM IN |
| First End Nominal Thread Size | 0.5625 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 |
|---|---|
| 66-1103 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-00-537-2805 is a Bolt,fluid Passage, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-00-537-2805: First End Thread Series Designator: UNF; First End Thread Direction: RIGHT-HAND; Length From Bearing Surface of Wrenching Feature to End of First Diameter: 0.140 INCHES MINIMUM AND 0.142 INCHES MAXIMUM IN; Third Diameter From Wrenching Feature: 0.480 INCHES MINIMUM AND 0.485 INCHES MAXIMUM IN. 24 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.