The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-00-116-6667, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-116-6667 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.172 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN |
| Fastener Length | 1.570 INCHES MINIMUM AND 1.610 INCHES MAXIMUM IN |
| Thread Length | 0.469 INCHES MINIMUM IN |
| Hardness Rating | 28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | SAE J404 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| First Diameter From Head | 0.248 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 1.121 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.213 INCHES MINIMUM AND 0.216 INCHES MAXIMUM IN |
| Width Between Flats | 0.367 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.850 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN |
| Askewed Head Angle | 88.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM |
| Externally Relieved Body Diameter Quantity | 2 |
| Surface Treatment | OXIDE OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 8640 OR STEEL COMP 4140 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 13206E1066 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-00-116-6667 is a Bolt,externally Relieved Body, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-116-6667: Head Height: 0.172 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN; Fastener Length: 1.570 INCHES MINIMUM AND 1.610 INCHES MAXIMUM IN; Thread Length: 0.469 INCHES MINIMUM IN; Hardness Rating: 28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL. 20 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.