The Bolt,machine, cataloged under National Stock Number 5306-00-151-1056, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Leonardo Uk Ltd. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-151-1056 |
| Primary Part Number | AN4DD6A |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Leonardo Uk Ltd |
| Status | ACTIVE |
| Head Height | 0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN |
| Fastener Length | 0.781 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-C-5541 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-A-8625 MIL SPEC 2ND TREATMENT RESPONSE OVERALL |
| Thread Length | 0.469 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-A-267 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-268 FED SPEC 1ST MATERIAL RESPONSE OR MIL-W-7986 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.312 INCHES NOMINAL IN |
| Width Between Flats | 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN |
| Surface Treatment | OXIDE FILM AND ANODIZE OVERALL |
| Minimum Tensile Strength | 62000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 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 |
| Part Number | Manufacturer |
|---|---|
| AN4DD6A | Leonardo Uk Ltd (GBR) |
| Reference | Meaning |
|---|---|
| AN4DD6A | 2/2 Government specification standardization U.S. Government activity |
| B6812 | 4/1 Identification reference U.S. Government activity |
NSN 5306-00-151-1056 is a Bolt,machine, manufactured by Leonardo Uk Ltd, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-151-1056 has 1 manufacturer part number on file: AN4DD6A (Leonardo Uk Ltd).
Key specifications for AN4DD6A: Head Height: 0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN; Fastener Length: 0.781 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-A-8625 MIL SPEC 2ND TREATMENT RESPONSE OVERALL; Thread Length: 0.469 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.