The Bolt,fluid Passage, cataloged under National Stock Number 4730-00-322-1491, 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 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-322-1491 |
| Primary Part Number | 276634 |
| Item Name | Bolt,fluid Passage |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| First End Thread Series Designator | UNF |
| Width Across Flats | 0.622 INCHES NOMINAL IN |
| First End Thread Direction | RIGHT-HAND |
| Length From Bearing Surface of Wrenching Feature to End of First Diameter | 0.370 INCHES NOMINAL IN |
| Body Style | PLAIN |
| First End Thread Class | 2A A |
| First End Style Designator | PLAIN |
| Concentric Hole Depth | 0.810 INCHES NOMINAL IN |
| Wrenching Feature Height | 0.250 INCHES NOMINAL IN |
| First End Thread Length | 0.505 INCHES NOMINAL IN |
| Wrenching Feature Style | HEXAGON |
| Material Document and Classification | AMS 5616 ASSN STD SINGLE MATERIAL RESPONSE |
| Length From Bearing Surface of Wrenching Feature to Bolt End | 0.875 INCHES NOMINAL IN |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Concentric Hole Diameter | 0.281 INCHES NOMINAL IN |
| First Radial Fluid Hole Diameter | 0.281 INCHES NOMINAL IN |
| Distance From First Radial Hole Center to End of Bolt | 0.680 INCHES NOMINAL IN |
| Material | STEEL |
| First Diameter From Wrenching Feature | 0.435 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 |
|---|---|
| 276634 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 276634 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
NSN 4730-00-322-1491 is a Bolt,fluid Passage, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-322-1491 has 1 manufacturer part number on file: 276634 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-173-8573, 6750-01-427-2885. Verify interchangeability with system specifications before substitution.
Key specifications for 276634: First End Thread Series Designator: UNF; Width Across Flats: 0.622 INCHES NOMINAL IN; First End Thread Direction: RIGHT-HAND; Length From Bearing Surface of Wrenching Feature to End of First Diameter: 0.370 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.