The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-01-323-3778, 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19 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-323-3778 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.125 INCHES NOMINAL IN |
| Fastener Length | 1.062 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-C-13924,CL4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.410 INCHES NOMINAL IN |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | ASTM A582 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5643 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.140 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.375 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.652 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Color | BLACK OVERALL |
| Surface Treatment | OXIDE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 303 OR STEEL COMP 630 OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 3041974P1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-323-3778 is a Bolt,externally Relieved Body, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-323-3778: Head Height: 0.125 INCHES NOMINAL IN; Fastener Length: 1.062 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-C-13924,CL4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.410 INCHES NOMINAL 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.