The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-705-6721, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-705-6721 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.110 INCHES NOMINAL IN |
| Fastener Length | 3.0255 INCHES NOMINAL IN |
| Thread Length | 0.338 INCHES NOMINAL IN |
| Material Document and Classification | AMS4928 AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE OR AMS4 AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS673 THRU NAS678 NATIONAL STD/SPEC |
| Grip Length | 2.6875 INCHES NOMINAL IN |
| Width Between Flats | 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | TITANIUM ALLOY UNS R56400 OVERALL |
| 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 |
|---|---|
| NAS673V43 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-705-6721 is a Bolt,close Tolerance, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-705-6721: Head Height: 0.110 INCHES NOMINAL IN; Fastener Length: 3.0255 INCHES NOMINAL IN; Thread Length: 0.338 INCHES NOMINAL IN; Material Document and Classification: AMS4928 AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE OR AMS4 AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE OVERALL. 16 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.