The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-01-124-5244, 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19 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-124-5244 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.200 INCHES NOMINAL IN |
| Fastener Length | 4.880 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-N-290 CLASS 1 GRADE G FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.480 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.324 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 3.990 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.240 INCHES NOMINAL IN |
| Width Between Flats | 0.502 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.380 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Surface Treatment | NICKEL OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 4130 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 |
|---|---|
| 2020504-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-124-5244 is a Bolt,externally Relieved Body, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-124-5244: Head Height: 0.200 INCHES NOMINAL IN; Fastener Length: 4.880 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-N-290 CLASS 1 GRADE G FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.480 INCHES MINIMUM AND 0.540 INCHES MAXIMUM 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.