The Bolt,fluid Passage, cataloged under National Stock Number 4730-00-028-8087, 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 De Havilland Aircraft of Canada Limited. Government technical data includes 27 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-028-8087 |
| Primary Part Number | C2U185 |
| Item Name | Bolt,fluid Passage |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | De Havilland Aircraft of Canada Limited |
| Status | ACTIVE |
| First End Thread Series Designator | UNF |
| First End Thread Direction | RIGHT-HAND |
| Second End Nominal Thread Size | 0.062 INCHES IN |
| Length From Bearing Surface of Wrenching Feature to End of First Diameter | 4.000 INCHES NOMINAL IN |
| Body Style | SHOULDER |
| Distance From Centerline to Flat | 0.510 INCHES NOMINAL IN |
| First End Thread Class | 3A A |
| First End Style Designator | PLAIN |
| Second Diameter From Wrenching Feature | 0.125 INCHES NOMINAL IN |
| Concentric Hole Depth | 3.500 INCHES NOMINAL IN |
| Wrenching Feature Height | 0.150 INCHES NOMINAL IN |
| Second End Thread Series Designator | NPT |
| First End Thread Length | 0.500 INCHES NOMINAL IN |
| Wrenching Feature Style | ROUND WITH WRENCH FLATS |
| Second End Thread Direction | RIGHT-HAND |
| Length From Bearing Surface of Wrenching Feature to End of Second Diameter | 4.125 INCHES NOMINAL IN |
| Second End Style Designator | PLAIN |
| Length From Bearing Surface of Wrenching Feature to Bolt End | 4.500 INCHES NOMINAL IN |
| Concentric Hole Diameter | 0.209 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM |
| First Radial Fluid Hole Diameter | 0.156 INCHES NOMINAL IN |
| Distance From First Radial Hole Center to End of Bolt | 3.750 INCHES NOMINAL IN |
| Material | STEEL |
| Second End Thread Length | 0.250 INCHES NOMINAL IN |
| First Diameter From Wrenching Feature | 0.872 INCHES NOMINAL IN |
| First End Nominal Thread Size | 0.375 INCHES IN |
| Head Diameter | 1.375 INCHES NOMINAL 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 |
|---|---|
| C2U185 PRIMARY | De Havilland Aircraft of Canada Limited (CAN) |
| Reference | Meaning |
|---|---|
| 5306-L20-006 | 5/2 Secondary reference U.S. Government activity |
NSN 4730-00-028-8087 is a Bolt,fluid Passage, manufactured by De Havilland Aircraft of Canada Limited, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-028-8087 has 1 manufacturer part number on file: C2U185 (De Havilland Aircraft of Canada Limited).
Key specifications for C2U185: First End Thread Series Designator: UNF; First End Thread Direction: RIGHT-HAND; Second End Nominal Thread Size: 0.062 INCHES IN; Length From Bearing Surface of Wrenching Feature to End of First Diameter: 4.000 INCHES NOMINAL IN. 27 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.