The Bolt,fluid Passage, cataloged under National Stock Number 4730-01-189-6594, 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 28 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-01-189-6594 |
| 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) |
| First End Thread Direction | RIGHT-HAND |
| Second End Nominal Thread Size | 0.125 INCHES IN |
| Length From Bearing Surface of Wrenching Feature to End of First Diameter | 1.906 INCHES NOMINAL IN |
| Body Style | SHOULDER |
| Distance From Centerline to Flat | 0.500 INCHES NOMINAL IN |
| First End Thread Class | 2A A |
| First End Style Designator | FLARED |
| Second Diameter From Wrenching Feature | 0.500 INCHES NOMINAL IN |
| Concentric Hole Depth | 1.984 INCHES NOMINAL IN |
| Wrenching Feature Height | 0.188 INCHES NOMINAL IN |
| Second End Thread Series Designator | NPTF |
| First End Thread Length | 1.094 INCHES NOMINAL IN |
| Wrenching Feature Style | ROUND WITH WRENCH FLATS |
| Material Document and Classification | QQ-N-286,CLASS A FED SPEC SINGLE MATERIAL RESPONSE |
| Second End Thread Direction | RIGHT-HAND |
| Length From Bearing Surface of Wrenching Feature to End of Second Diameter | 2.031 INCHES NOMINAL IN |
| First End Seat Angle | 45.0 DEGREES NOMINAL |
| Second End Style Designator | PLAIN |
| Length From Bearing Surface of Wrenching Feature to Bolt End | 2.875 INCHES NOMINAL IN |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Concentric Hole Diameter | 0.250 INCHES NOMINAL IN |
| First Radial Fluid Hole Diameter | 0.094 INCHES NOMINAL IN |
| Distance From First Radial Hole Center to End of Bolt | 2.625 INCHES NOMINAL IN |
| Material | NICKEL ALLOY |
| Second End Thread Length | 1.875 INCHES NOMINAL IN |
| Second End Connection Type | THREADED INTERNAL PIPE |
| First Diameter From Wrenching Feature | 0.747 INCHES MINIMUM AND 0.749 INCHES MAXIMUM 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 |
|---|---|
| SSN637-501-2143837 | D/9 Drawing number reference only U.S. Government activity |
| 77643-93X3 | D/9 Drawing number reference only U.S. Government activity |
| 77643-93X3 PIECE 6 | 3/2 Design control — primary reference U.S. Government activity |
| SSN637-501-2143837 PIECE 6 | 5/2 Secondary reference U.S. Government activity |
NSN 4730-01-189-6594 is a Bolt,fluid Passage, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-189-6594: First End Thread Series Designator: UNIFIED NATIONAL COARSE (UNC); First End Thread Direction: RIGHT-HAND; Second End Nominal Thread Size: 0.125 INCHES IN; Length From Bearing Surface of Wrenching Feature to End of First Diameter: 1.906 INCHES NOMINAL IN. 28 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.