The Bolt,fluid Passage, cataloged under National Stock Number 4730-01-433-2638, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-433-2638 |
| Primary Part Number | 6990424 |
| Item Name | Bolt,fluid Passage |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| First End Thread Series Designator | UNF |
| Width Across Flats | 1.438 INCHES NOMINAL IN |
| First End Thread Direction | RIGHT-HAND |
| Body Style | PLAIN |
| First End Thread Class | 2A A |
| First End Style Designator | FLARED |
| Wrenching Feature Height | 1.438 INCHES NOMINAL IN |
| First End Thread Length | 0.308 INCHES NOMINAL IN |
| Wrenching Feature Style | SQUARE |
| First End Seat Angle | 37.0 DEGREES NOMINAL |
| Length From Bearing Surface of Wrenching Feature to Bolt End | 0.650 INCHES NOMINAL IN |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Concentric Hole Diameter | 0.500 INCHES NOMINAL IN |
| First Radial Fluid Hole Diameter | 0.204 INCHES NOMINAL IN |
| Distance From First Radial Hole Center to End of Bolt | 0.943 INCHES NOMINAL IN |
| Material | STEEL COMP 304 |
| Second Radial Fluid Hole Diameter | 0.125 INCHES NOMINAL IN |
| Distance From Second Radial Hole Center to End of Bolt | 0.234 INCHES NOMINAL IN |
| First Diameter From Wrenching Feature | 0.744 INCHES NOMINAL IN |
| First End Nominal Thread Size | 6.000 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 |
| Part Number | Manufacturer |
|---|---|
| 6990424 PRIMARY | Naval Sea Systems Command (USA) |
NSN 4730-01-433-2638 is a Bolt,fluid Passage, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-433-2638 has 1 manufacturer part number on file: 6990424 (Naval Sea Systems Command).
Key specifications for 6990424: First End Thread Series Designator: UNF; Width Across Flats: 1.438 INCHES NOMINAL IN; First End Thread Direction: RIGHT-HAND; Body Style: PLAIN. 20 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.