The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-715-8366, 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20 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-715-8366 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Fastener Length | 0.667 INCHES MINIMUM AND 0.697 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS-QQ-C-320, CLASS 2 NATIONAL STD SINGLE TREATMENT RESPONSE GRIP |
| Surface Treatment Document and Classification | AMS-QQ-P-416, TYPE II, CLASS 2 NATIONAL STD SINGLE TREATMENT RESPONSE HEAD |
| Thread Length | 0.370 INCHES NOMINAL IN |
| Material Document and Classification | AMS6349 AEROSPACE MATERIAL SPEC STD 1ST MATERIAL RESPONSE OR AMS6382 AEROSPACE MATERIAL SPEC STD 1ST MATERIAL RESPONSE OR AMS6415 AEROSPACE MATERIAL SPEC STD 2ND MATERIAL RESPONSE OR AMS6484 AEROSPACE MATERIAL SPEC STD 2ND MATERIAL RESPONSE OR AMS6322 AEROSPACE MATERIAL SPEC STD 3RD MATERIAL RESPONSE OR AMS6325 AEROSPACE MATERIAL SPEC STD 3RD MATERIAL RESPONSE OR AMS6327 AEROSPACE MATERIAL SPEC STD 3RD MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS6203 THRU NAS6220 NATIONAL STD/SPEC |
| Grip Length | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Width Between Flats | 0.429 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | CHROMIUM GRIP |
| Surface Treatment | CADMIUM HEAD |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 4140 OR STEEL COMP 4340 OR STEEL COMP 8740 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 |
|---|---|
| NAS6204C5 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-715-8366 is a Bolt,close Tolerance, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-715-8366: Head Height: 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN; Fastener Length: 0.667 INCHES MINIMUM AND 0.697 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS-QQ-C-320, CLASS 2 NATIONAL STD SINGLE TREATMENT RESPONSE GRIP; Surface Treatment Document and Classification: AMS-QQ-P-416, TYPE II, CLASS 2 NATIONAL STD SINGLE TREATMENT RESPONSE HEAD. 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.