The Bolt,fluid Passage, cataloged under National Stock Number 4730-00-288-0557, 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28 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-288-0557 |
| 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 JOINT FINE (UNJF) |
| Width Across Flats | 1.000 INCHES NOMINAL IN |
| First End Thread Direction | RIGHT-HAND |
| Second End Thread Quantity Per Inch | 28 |
| Second End Nominal Thread Size | 0.250 INCHES IN |
| Length From Bearing Surface of Wrenching Feature to End of First Diameter | 3.850 INCHES MINIMUM AND 3.865 INCHES MAXIMUM IN |
| Second End Thread Class | 3B |
| Body Style | SHOULDER |
| First End Thread Class | 3A A |
| Cotter Pin Hole Diameter | 0.155 INCHES MINIMUM AND 0.162 INCHES MAXIMUM IN |
| First End Thread Quantity Per Inch | 18 |
| First End Style Designator | PLAIN |
| Second Diameter From Wrenching Feature | 0.534 INCHES MINIMUM AND 0.544 INCHES MAXIMUM IN |
| Concentric Hole Depth | 3.800 INCHES NOMINAL IN |
| Wrenching Feature Height | 0.310 INCHES NOMINAL IN |
| Second End Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| First End Thread Length | 0.640 INCHES MINIMUM AND 0.670 INCHES MAXIMUM IN |
| Criticality Code Justification | BBKL |
| Wrenching Feature Style | HEXAGON |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE |
| Second End Thread Direction | RIGHT-HAND |
| Length From Bearing Surface of Wrenching Feature to End of Second Diameter | 4.035 INCHES MINIMUM AND 4.050 INCHES MAXIMUM IN |
| Second End Style Designator | DOUBLE COMPRESSION |
| Length From Bearing Surface of Wrenching Feature to Bolt End | 4.510 INCHES MINIMUM AND 4.545 INCHES MAXIMUM IN |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Concentric Hole Diameter | 0.155 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN |
| Distance From Bolt End to Hole Center | 0.256 INCHES MINIMUM AND 0.286 INCHES MAXIMUM IN |
| First Radial Fluid Hole Diameter | 0.124 INCHES MINIMUM AND 4.129 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 | Y |
| Reference | Meaning |
|---|---|
| 1285130-101 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-00-288-0557 is a Bolt,fluid Passage, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-00-288-0557: First End Thread Series Designator: UNIFIED NATIONAL JOINT FINE (UNJF); Width Across Flats: 1.000 INCHES NOMINAL IN; First End Thread Direction: RIGHT-HAND; Second End Thread Quantity Per Inch: 28. 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.