The Bolt,fluid Passage, cataloged under National Stock Number 4730-00-815-0175, 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 Danfoss Power Solutions II, Llc. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-815-0175 |
| Primary Part Number | ER551-6D |
| Item Name | Bolt,fluid Passage |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Danfoss Power Solutions II, Llc |
| Status | ACTIVE |
| First End Thread Series Designator | UNF |
| Width Across Flats | 0.812 INCHES NOMINAL IN |
| First End Thread Direction | RIGHT-HAND |
| Length From Bearing Surface of Wrenching Feature to End of First Diameter | 0.749 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN |
| Body Style | PLAIN |
| First End Thread Class | 3A A |
| First End Thread Quantity Per Inch | 18 |
| First End Style Designator | PLAIN |
| Concentric Hole Depth | 1.125 INCHES NOMINAL IN |
| Wrenching Feature Height | 0.219 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN |
| First End Thread Length | 0.385 INCHES MINIMUM AND 0.511 INCHES MAXIMUM IN |
| Wrenching Feature Style | HEXAGON |
| Length From Bearing Surface of Wrenching Feature to Bolt End | 1.343 INCHES MINIMUM AND 1.367 INCHES MAXIMUM IN |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Concentric Hole Diameter | 0.297 INCHES NOMINAL IN |
| First Radial Fluid Hole Diameter | 0.250 INCHES NOMINAL IN |
| Distance From First Radial Hole Center to End of Bolt | 0.859 INCHES MINIMUM AND 0.898 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY OR ALUMINUM |
| First Diameter From Wrenching Feature | 0.560 INCHES NOMINAL IN |
| First End Nominal Thread Size | 0.562 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 |
|---|---|
| ER551-6D | Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company (USA) |
| ER551-6D PRIMARY | Danfoss Power Solutions II, Llc (USA) |
| ER551D06 | Danfoss Power Solutions II, Llc (USA) |
| Reference | Meaning |
|---|---|
| ER551D06 | 5/9 Secondary reference Dana Corp Weatherhead Div |
| ER551-6D | 3/9 Design control — primary reference Dana Corp Weatherhead Div |
NSN 4730-00-815-0175 is a Bolt,fluid Passage, manufactured by Danfoss Power Solutions II, Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-815-0175 has 3 manufacturer part numbers on file: ER551-6D (Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company), ER551-6D (Danfoss Power Solutions II, Llc), ER551D06 (Danfoss Power Solutions II, Llc).
Key specifications for ER551-6D: First End Thread Series Designator: UNF; Width Across Flats: 0.812 INCHES NOMINAL IN; First End Thread Direction: RIGHT-HAND; Length From Bearing Surface of Wrenching Feature to End of First Diameter: 0.749 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN. 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.