The Bolt,fluid Passage, cataloged under National Stock Number 4730-00-085-1902, 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 29 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-085-1902 |
| Item Name | Bolt,fluid Passage |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| First End Thread Series Designator | UNF |
| Width Across Flats | 0.871 INCHES MINIMUM AND 0.878 INCHES MAXIMUM IN |
| First End Thread Direction | RIGHT-HAND |
| Second End Thread Quantity Per Inch | 18 |
| Second End Nominal Thread Size | 0.562 INCHES IN |
| Length From Bearing Surface of Wrenching Feature to End of First Diameter | 0.377 INCHES NOMINAL IN |
| Second End Thread Class | 3A A |
| Third Diameter From Wrenching Feature | 0.811 INCHES NOMINAL IN |
| Body Style | BODY WRENCHING |
| First End Thread Class | 3A A |
| First End Thread Quantity Per Inch | 18 |
| First End Style Designator | FLARED |
| Length From Bearing Surface of Wrenching Feature to End of Third Diameter | 1.209 INCHES NOMINAL IN |
| Second Diameter From Wrenching Feature | 0.740 INCHES NOMINAL IN |
| Second End Seat Angle | 37.0 DEGREES NOMINAL |
| Wrenching Feature Height | 0.437 INCHES NOMINAL IN |
| Second End Thread Series Designator | UNF |
| First End Thread Length | 0.973 INCHES NOMINAL IN |
| Wrenching Feature Style | HEXAGON |
| Material Document and Classification | QQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE |
| Second End Thread Direction | RIGHT-HAND |
| Length From Bearing Surface of Wrenching Feature to End of Second Diameter | 0.826 INCHES NOMINAL IN |
| First End Seat Angle | 37.0 DEGREES NOMINAL |
| Specification/standard Data | 81343-AS4875/1 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 96906-MS21950 GOVERNMENT STANDARD |
| Second End Style Designator | FLARED |
| Length From Bearing Surface of Wrenching Feature to Bolt End | 2.359 INCHES NOMINAL IN |
| Concentric Hole Diameter | 0.297 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE |
| First Radial Fluid Hole Diameter | 0.300 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 |
| Reference | Meaning |
|---|---|
| AS4875/1 | 5/9 Secondary reference U.S. Government activity |
| MS21950-6H6 | 2/2 Government specification standardization U.S. Government activity |
| MIL-F-5509 | 5/9 Secondary reference U.S. Government activity |
| MS21950 | 4/1 Identification reference U.S. Government activity |
| AS4875/1 | 5/1 Secondary reference Sae International Dba Sae International |
NSN 4730-00-085-1902 is a Bolt,fluid Passage, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 4730-00-613-5293, 4730-00-684-0506, 4730-01-395-3923. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-00-085-1902: First End Thread Series Designator: UNF; Width Across Flats: 0.871 INCHES MINIMUM AND 0.878 INCHES MAXIMUM IN; First End Thread Direction: RIGHT-HAND; Second End Thread Quantity Per Inch: 18. 29 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.