The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-00-208-0653, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 24 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-208-0653 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.875 INCHES NOMINAL IN |
| Fastener Length | 5.812 INCHES NOMINAL IN |
| Internal Thread Length | 1.188 INCHES NOMINAL COUNTERBORE IN |
| Thread Series | UNS COUNTERBORE |
| Concentric Hole Depth | 3.469 INCHES NOMINAL IN |
| Internal Thread Direction | RIGHT-HAND COUNTERBORE |
| Thread Length | 0.938 INCHES MINIMUM IN |
| Shank Unthreaded Hole Diameter | 0.188 INCHES NOMINAL FIRST HOLE IN |
| Threads Per Inch | 27 COUNTERBORE |
| Style Designator | COUNTERBORE THREADED |
| Nominal Thread Diameter | 1.500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.125 INCHES COUNTERBORE IN |
| Width Between Flats | 2.250 INCHES NOMINAL IN |
| Shoulder Diameter | 1.750 INCHES NOMINAL IN |
| Internal Thread Class | 1B COUNTERBORE |
| Concentric Hole Diameter | 0.316 INCHES NOMINAL IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1023 OR STEEL COMP 1025 OVERALL |
| Shoulder Length | 4.875 INCHES NOMINAL IN |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 3.375 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 |
|---|---|
| 45B22968 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5306-00-208-0653 is a Bolt,internally Relieved Body, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-208-0653: Head Height: 0.875 INCHES NOMINAL IN; Fastener Length: 5.812 INCHES NOMINAL IN; Internal Thread Length: 1.188 INCHES NOMINAL COUNTERBORE IN; Thread Series: UNS COUNTERBORE. 24 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.