The Bolt,fluid Passage, cataloged under National Stock Number 4730-01-028-1844, 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 Williams International Co., L.l.c.. 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. 2 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 | 4730-01-028-1844 |
| Primary Part Number | 25312 |
| Item Name | Bolt,fluid Passage |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Williams International Co., L.l.c. |
| Status | ACTIVE |
| First End Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Width Across Flats | 0.750 INCHES NOMINAL IN |
| First End Thread Direction | RIGHT-HAND |
| Length From Bearing Surface of Wrenching Feature to End of First Diameter | 0.587 INCHES NOMINAL IN |
| Body Style | PLAIN |
| First End Thread Class | 3A A |
| First End Thread Quantity Per Inch | 20 |
| First End Style Designator | PLAIN |
| Concentric Hole Depth | 0.900 INCHES NOMINAL IN |
| Wrenching Feature Height | 0.188 INCHES NOMINAL IN |
| First End Thread Length | 0.438 INCHES NOMINAL IN |
| Wrenching Feature Style | HEXAGON |
| Length From Bearing Surface of Wrenching Feature to Bolt End | 1.025 INCHES NOMINAL IN |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Concentric Hole Diameter | 0.175 INCHES NOMINAL IN |
| First Radial Fluid Hole Diameter | 0.190 INCHES NOMINAL IN |
| Distance From First Radial Hole Center to End of Bolt | 0.765 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| First Diameter From Wrenching Feature | 0.433 INCHES NOMINAL IN |
| First End Nominal Thread Size | 0.438 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 |
|---|---|
| 25312 PRIMARY | Williams International Co., L.l.c. (USA) |
NSN 4730-01-028-1844 is a Bolt,fluid Passage, manufactured by Williams International Co., L.l.c., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-028-1844 has 1 manufacturer part number on file: 25312 (Williams International Co., L.l.c.).
2 possible matches (shared part number, not a government interchangeability claim): 5365-01-148-1294, 3110-01-213-4271. Verify interchangeability with system specifications before substitution.
Key specifications for 25312: First End Thread Series Designator: UNIFIED NATIONAL JOINT FINE (UNJF); Width Across Flats: 0.750 INCHES NOMINAL IN; First End Thread Direction: RIGHT-HAND; Length From Bearing Surface of Wrenching Feature to End of First Diameter: 0.587 INCHES NOMINAL 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.