The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-00-877-6424, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-877-6424 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.220 INCHES NOMINAL IN |
| Fastener Length | 3.485 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 3,CL 1 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| Thread Length | 0.660 INCHES MINIMUM IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 5TH MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.498 INCHES MINIMUM AND 0.499 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 2.825 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.420 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN |
| Width Between Flats | 0.753 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 2.600 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 2 |
| Surface Treatment | CADMIUM AND PHOSPHATE OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 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 |
|---|---|
| 204-011-171-1 | 3/2 Design control — primary reference U.S. Government activity |
| 1560-UH1-193-3 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-00-877-6424 is a Bolt,externally Relieved Body, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-877-6424: Head Height: 0.220 INCHES NOMINAL IN; Fastener Length: 3.485 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416,TY 3,CL 1 FED SPEC ALL TREATMENT RESPONSES OVERALL; Thread Length: 0.660 INCHES MINIMUM IN. 21 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.