The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-00-321-9006, 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20 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-321-9006 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.130 INCHES NOMINAL IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) CONCENTRIC HOLE |
| Concentric Hole Depth | 1.000 INCHES NOMINAL IN |
| Thread Length | 0.600 INCHES MAXIMUM IN |
| Threads Per Inch | 28 CONCENTRIC HOLE |
| Style Designator | CONCENTRIC HOLE THREADED |
| Material Document and Classification | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES CONCENTRIC HOLE IN |
| Width Between Flats | 0.750 INCHES NOMINAL IN |
| Shoulder Diameter | 0.365 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN |
| Internal Thread Class | 3B CONCENTRIC HOLE |
| Concentric Hole Diameter | 0.250 INCHES NOMINAL IN |
| Minimum Tensile Strength | 135000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Shoulder Length | 1.120 INCHES NOMINAL IN |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| 1210188-101 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-00-321-9006 is a Bolt,internally Relieved Body, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-321-9006: Head Height: 0.130 INCHES NOMINAL IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF) CONCENTRIC HOLE; Concentric Hole Depth: 1.000 INCHES NOMINAL IN; Thread Length: 0.600 INCHES MAXIMUM IN. 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.