The Bolt,fluid Passage, cataloged under National Stock Number 4730-00-278-0375, 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 Sae International Dba Sae International. Government technical data includes 23 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through both NSN and commercial part number lookups. 18 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4730-00-278-0375 |
| Primary Part Number | AS5161-04 |
| Item Name | Bolt,fluid Passage |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sae International Dba Sae International |
| Status | CANCELLED |
| First End Thread Series Designator | UNF |
| Width Across Flats | 0.688 INCHES NOMINAL IN |
| First End Thread Direction | RIGHT-HAND |
| Length From Bearing Surface of Wrenching Feature to End of First Diameter | 0.750 INCHES NOMINAL IN |
| Body Style | PLAIN |
| First End Thread Class | 3A A |
| First End Style Designator | FLARED |
| Concentric Hole Depth | 1.156 INCHES NOMINAL IN |
| Wrenching Feature Height | 0.188 INCHES NOMINAL IN |
| First End Thread Length | 0.437 INCHES NOMINAL IN |
| Wrenching Feature Style | HEXAGON |
| First End Seat Angle | 45.0 DEGREES NOMINAL |
| Specification/standard Data | 81343-AS4875 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 88044-AN775 GOVERNMENT STANDARD |
| Length From Bearing Surface of Wrenching Feature to Bolt End | 1.187 INCHES NOMINAL IN |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Concentric Hole Diameter | 0.172 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM |
| Minimum Tensile Strength | 25000 POUNDS PER SQUARE INCH LBS |
| First Radial Fluid Hole Diameter | 0.187 INCHES NOMINAL IN |
| Distance From First Radial Hole Center to End of Bolt | 0.781 INCHES NOMINAL IN |
| Material | STEEL |
| First Diameter From Wrenching Feature | 0.435 INCHES NOMINAL IN |
| First End Nominal Thread Size | 0.437 INCHES IN |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| AS5161-04 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| AS4875 | 5/9 Secondary reference U.S. Government activity |
| AS5161 | 3/1 Design control — primary reference Sae International Dba Sae International |
| AN775-4 | 5/9 Secondary reference Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
| 4730002780375 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| AS4875 | 5/9 Secondary reference Sae International Dba Sae International |
| DB775-4C | 5/1 Secondary reference Deutsch Co the |
| AN775-4 | 5/9 Secondary reference U.S. Government activity |
| 682901 | 5/9 Secondary reference U.S. Government activity |
| AS5161-04 | 5/9 Secondary reference U.S. Government activity |
| AN775-4 | 5/9 Secondary reference Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply |
| AS5161 | 5/9 Secondary reference U.S. Government activity |
| 1-2956-1 | 5/9 Secondary reference Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
| 4730002780375 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| SAE-AS4875 | 5/1 Secondary reference Sae International Dba Sae International |
| AN775-4 | 5/9 Secondary reference Hydro-Fitting Manufacturing Corporation |
| AN775-4 | 5/9 Secondary reference Crown Fitting Co Inc |
| AN775-4 | 5/9 Secondary reference Faber Enterprises, Inc. Div Faber Enterprise Inc |
| AN775-4 | 5/9 Secondary reference Satair A/s |
NSN 4730-00-278-0375 is a Bolt,fluid Passage, manufactured by Sae International Dba Sae International, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: cancelled.
NSN 4730-00-278-0375 has 1 manufacturer part number on file: AS5161-04 (Sae International Dba Sae International).
7 possible matches (shared part number, not a government interchangeability claim): 4730-00-278-0377, 4730-00-278-0380, 4730-00-278-0382. Verify interchangeability with system specifications before substitution.
Key specifications for AS5161-04: First End Thread Series Designator: UNF; Width Across Flats: 0.688 INCHES NOMINAL IN; First End Thread Direction: RIGHT-HAND; Length From Bearing Surface of Wrenching Feature to End of First Diameter: 0.750 INCHES NOMINAL IN. 23 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.
NSN 4730-00-278-0375 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.