The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-687-5478, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-687-5478 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.125 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | AMS-QQ-P-416 NATIONAL STD ALL TREATMENT RESPONSES OVERALL |
| Thread Length | 0.425 INCHES NOMINAL IN |
| Material Document and Classification | AMS6349 NATIONAL STD ALL MATERIAL RESPONSES OR AMS6382 NATIONAL STD ALL MATERIAL RESPONSES OR AMS6415 NATIONAL STD ALL MATERIAL RESPONSES OR 6484 NATIONAL STD ALL MATERIAL RESPONSES OR AMS6322 NATIONAL STD ALL MATERIAL RESPONSES OR AMS6325 NATIONAL STD ALL MATERIAL RESPONSES OR AMS6327 NATIONAL STD ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.2500 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.429 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Grip Diameter | 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL 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 |
|---|---|
| NAS6604-37 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-687-5478 is a Bolt,close Tolerance, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-687-5478: Head Height: 0.125 INCHES NOMINAL IN; Surface Treatment Document and Classification: AMS-QQ-P-416 NATIONAL STD ALL TREATMENT RESPONSES OVERALL; Thread Length: 0.425 INCHES NOMINAL IN; Material Document and Classification: AMS6349 NATIONAL STD ALL MATERIAL RESPONSES OR AMS6382 NATIONAL STD ALL MATERIAL RESPONSES OR AMS6415 NATIONAL STD ALL MATERIAL RESPONSES OR 6484 NATIONAL STD ALL MATERIAL RESPONSES OR AMS6322 NATIONAL STD ALL MATERIAL RESPONSES OR AMS6325 NATIONAL STD ALL MATERIAL RESPONSES OR AMS6327 NATIONAL STD ALL MATERIAL RESPONSES OVERALL. 13 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.