The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-384-3443, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-384-3443 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.764 INCHES NOMINAL IN |
| Fastener Length | 1.429 INCHES MINIMUM AND 1.459 INCHES MAXIMUM IN |
| Thread Length | 0.694 INCHES NOMINAL IN |
| Hole Configuration Style | HEXAGON CORNERS |
| Nominal Thread Diameter | 0.4375 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Width Between Flats | 0.678 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN |
| Grip Diameter | 0.4360 INCHES MINIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP E4340 AND STEEL COMP 8740 OVERALL |
| Hole Quantity | 3 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN |
| 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 |
|---|---|
| NAS6607D12 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-384-3443 is a Bolt,close Tolerance, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-384-3443: Head Height: 0.764 INCHES NOMINAL IN; Fastener Length: 1.429 INCHES MINIMUM AND 1.459 INCHES MAXIMUM IN; Thread Length: 0.694 INCHES NOMINAL IN; Hole Configuration Style: HEXAGON CORNERS. 18 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.