The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-00-559-0534, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Allison Transmission Inc Dba Allison Transmission, Inc. Government technical data includes 28 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-559-0534 |
| Primary Part Number | 6784358 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| Status | ACTIVE |
| Fourth Diameter From Head | 0.500 INCHES NOMINAL IN |
| Head Height | 0.344 INCHES NOMINAL IN |
| Fastener Length | 5.156 INCHES NOMINAL IN |
| Thread Length | 0.781 INCHES MINIMUM IN |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.131 INCHES NOMINAL FIRST HOLE IN |
| Hole Configuration Style | HEXAGON FLATS |
| First Diameter From Head | 0.635 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 2.719 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 3.094 INCHES NOMINAL IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.500 INCHES NOMINAL IN |
| Width Between Flats | 0.934 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.625 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 4 |
| Minimum Tensile Strength | 142000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP 4340 OVERALL |
| Hole Quantity | 3 |
| Distance From Largest Bearing Surface of Head to End of Fourth Diameter | 4.375 INCHES NOMINAL IN |
| Third Diameter From Head | 0.635 INCHES NOMINAL IN |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 4.891 INCHES NOMINAL FIRST HOLE IN |
| Hole Type | DRILLED |
| Hole Diameter | 0.070 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 |
NSN 5306-00-559-0534 is a Bolt,externally Relieved Body, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-559-0534 has 2 manufacturer part numbers on file: 6784358 (Allison Transmission Inc Dba Allison Transmission, Inc), 6784358 (General Motors Corp).
Key specifications for 6784358: Fourth Diameter From Head: 0.500 INCHES NOMINAL IN; Head Height: 0.344 INCHES NOMINAL IN; Fastener Length: 5.156 INCHES NOMINAL IN; Thread Length: 0.781 INCHES MINIMUM IN. 28 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.