The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-01-370-6945, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-370-6945 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.500 INCHES NOMINAL IN |
| Fastener Length | 1.860 INCHES NOMINAL IN |
| Thread Length | 0.900 INCHES NOMINAL IN |
| Style Designator | COUNTERBORE UNTHREADED |
| Material Document and Classification | AMS 5659 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5643 ASSN STD 2ND MATERIAL RESPONSE OR ASTM A564 ASSN STD 3RD MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 1.312 INCHES IN |
| Counterbore Depth | 0.125 INCHES NOMINAL IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Counterbore Diameter | 1.252 INCHES NOMINAL IN |
| Width Between Flats | 1.990 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN |
| Concentric Hole Diameter | 0.647 INCHES MINIMUM AND 0.649 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP XM-12 OR STEEL COMP 630 OVERALL |
| Thread Series Designator | UN |
| 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 |
|---|---|
| 87505127-001 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-370-6945 is a Bolt,internally Relieved Body, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-370-6945: Head Height: 0.500 INCHES NOMINAL IN; Fastener Length: 1.860 INCHES NOMINAL IN; Thread Length: 0.900 INCHES NOMINAL IN; Style Designator: COUNTERBORE UNTHREADED. 17 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.