The Bolt,internal Wrenching, cataloged under National Stock Number 5306-00-550-4394, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company. Government technical data includes 17 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-550-4394 |
| Primary Part Number | 2447139 |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Width Across Flats | 0.376 INCHES MINIMUM AND 0.379 INCHES MAXIMUM IN |
| Head Height | 0.343 INCHES NOMINAL IN |
| Fastener Length | 2.500 INCHES NOMINAL IN |
| Thread Length | 1.188 INCHES MINIMUM IN |
| Hole Configuration Style | ROUND |
| Material Document and Classification | MIL-G-6183 CL 1 GRADE MEDIUM MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | BEVEL-CONICAL |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Hole Quantity | 6 |
| Thread Series Designator | UNF |
| Hole Type | DRILLED |
| Hole Diameter | 0.062 INCHES NOMINAL IN |
| Head Diameter | 0.615 INCHES MINIMUM AND 0.625 INCHES MAXIMUM 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 |
|---|---|
| 2447139 PRIMARY | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| 2447139 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| 2447139 | 5/9 Secondary reference U.S. Government activity |
| NAS146DH-40 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-00-550-4394 is a Bolt,internal Wrenching, manufactured by The Boeing Company, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-550-4394 has 1 manufacturer part number on file: 2447139 (The Boeing Company).
Key specifications for 2447139: Width Across Flats: 0.376 INCHES MINIMUM AND 0.379 INCHES MAXIMUM IN; Head Height: 0.343 INCHES NOMINAL IN; Fastener Length: 2.500 INCHES NOMINAL IN; Thread Length: 1.188 INCHES MINIMUM IN. 17 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.