The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-051-3199, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-051-3199 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Extended Washer Thickness | 0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN |
| Head Height | 0.338 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN |
| Fastener Length | 2.369 INCHES MINIMUM AND 2.399 INCHES MAXIMUM IN |
| Extended Washer Diameter | 0.072 INCHES MINIMUM AND 0.092 INCHES MAXIMUM IN |
| Thread Length | 0.547 INCHES MINIMUM AND 0.597 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS1272 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 1.802 INCHES MINIMUM AND 1.822 INCHES MAXIMUM IN |
| Width Between Flats | 0.368 INCHES MINIMUM AND 0.377 INCHES MAXIMUM IN |
| Grip Diameter | 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | TITANIUM ALLOY UNS R54520 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 |
|---|---|
| NAS1272-29 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-051-3199 is a Bolt,close Tolerance, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-051-3199: Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Extended Washer Thickness: 0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN; Head Height: 0.338 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN; Fastener Length: 2.369 INCHES MINIMUM AND 2.399 INCHES MAXIMUM IN. 17 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.