The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-00-730-3048, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 25 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-730-3048 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.406 INCHES NOMINAL IN |
| Fastener Length | 5.240 INCHES MINIMUM AND 5.260 INCHES MAXIMUM IN |
| Internal Thread Length | 0.406 INCHES NOMINAL COUNTERBORE IN |
| Thread Series | UNF COUNTERBORE |
| Concentric Hole Depth | 2.656 INCHES NOMINAL IN |
| Internal Thread Direction | RIGHT-HAND COUNTERBORE |
| Thread Length | 0.875 INCHES MINIMUM IN |
| Hardness Rating | 28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.141 INCHES NOMINAL FIRST HOLE IN |
| Threads Per Inch | 28 COUNTERBORE |
| Style Designator | COUNTERBORE THREADED |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES COUNTERBORE IN |
| Width Between Flats | 0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.512 INCHES MINIMUM AND 0.519 INCHES MAXIMUM IN |
| Internal Thread Class | 2B COUNTERBORE |
| Concentric Hole Diameter | 0.213 INCHES NOMINAL IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 5140H OVERALL |
| Shoulder Length | 0.265 INCHES NOMINAL IN |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 4.990 INCHES MINIMUM AND 5.010 INCHES MAXIMUM 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 |
|---|---|
| 58A79B33 | 3/9 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 5306-00-730-3048 is a Bolt,internally Relieved Body, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-730-3048: Head Height: 0.406 INCHES NOMINAL IN; Fastener Length: 5.240 INCHES MINIMUM AND 5.260 INCHES MAXIMUM IN; Internal Thread Length: 0.406 INCHES NOMINAL COUNTERBORE IN; Thread Series: UNF COUNTERBORE. 25 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.