The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-00-206-0318, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-206-0318 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.640 INCHES MAXIMUM IN |
| Fastener Length | 3.490 INCHES MINIMUM AND 3.510 INCHES MAXIMUM IN |
| Thread Length | 1.188 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.187 INCHES NOMINAL FIRST HOLE IN |
| Material Document and Classification | QQ-N-286,CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.998 INCHES MINIMUM AND 0.999 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 2.312 INCHES NOMINAL IN |
| Nominal Thread Diameter | 1.000 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.877 INCHES MINIMUM AND 0.882 INCHES MAXIMUM IN |
| Width Between Flats | 1.500 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 2.124 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 2 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 12 |
| Material | NICKEL ALLOY K-500 OVERALL |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 3.188 INCHES NOMINAL FIRST HOLE 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 |
|---|---|
| A76278 | 5/9 Secondary reference U.S. Government activity |
| B3153685 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5306-00-206-0318 is a Bolt,externally Relieved Body, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-206-0318: Head Height: 0.640 INCHES MAXIMUM IN; Fastener Length: 3.490 INCHES MINIMUM AND 3.510 INCHES MAXIMUM IN; Thread Length: 1.188 INCHES MAXIMUM IN; Shank Unthreaded Hole Diameter: 0.187 INCHES NOMINAL FIRST HOLE IN. 19 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.