The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-00-574-8577, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 23 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-574-8577 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.190 INCHES NOMINAL IN |
| Fastener Length | 6.380 INCHES NOMINAL IN |
| Thread Length | 0.740 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.110 INCHES MINIMUM AND 0.115 INCHES MAXIMUM FIRST HOLE IN |
| Style Designator | COUNTERBORE UNTHREADED |
| Material Document and Classification | MIL-S-6050,F4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.875 INCHES IN |
| Counterbore Depth | 3.480 INCHES NOMINAL IN |
| Head Style | ROUND W/WRENCH FLATS CHAMFERED |
| Thread Direction | RIGHT-HAND |
| Counterbore Diameter | 0.748 INCHES MINIMUM AND 0.758 INCHES MAXIMUM IN |
| Width Between Flats | 1.053 INCHES MINIMUM AND 1.066 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.999 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN |
| Concentric Hole Diameter | 0.624 INCHES MINIMUM AND 0.631 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 14 |
| Material | STEEL COMP 8630 OVERALL |
| Shoulder Length | 5.430 INCHES MINIMUM AND 5.460 INCHES MAXIMUM IN |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 5.970 INCHES NOMINAL FIRST HOLE IN |
| Head Diameter | 1.250 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 |
| Reference | Meaning |
|---|---|
| 361647-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-00-574-8577 is a Bolt,internally Relieved Body, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-574-8577: Head Height: 0.190 INCHES NOMINAL IN; Fastener Length: 6.380 INCHES NOMINAL IN; Thread Length: 0.740 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN; Shank Unthreaded Hole Diameter: 0.110 INCHES MINIMUM AND 0.115 INCHES MAXIMUM FIRST HOLE IN. 23 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.