The Bolt,machine, cataloged under National Stock Number 5306-01-521-8071, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-521-8071 |
| Primary Part Number | 5749540 FIND 26 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Head Height | 0.203 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN |
| Fastener Length | 4.8125 INCHES MINIMUM AND 4.8593 INCHES MAXIMUM IN |
| Thread Length | 0.640 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5645 NATIONAL STD/SPEC 1ST MATERIAL RESPONSE OR AMS 5646 NATIONAL STD/SPEC 2ND MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.3750 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS501 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 4.17 INCHES MINIMUM AND 4.20 INCHES MAXIMUM IN |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN |
| Grip Diameter | 0.371 INCHES MINIMUM AND 0.374 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 7460 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 321 OR STEEL COMP 347 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 |
|---|---|
| 5749540 FIND 26 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 248-5749540 FIND 26 | 5/9 Secondary reference Naval Sea Systems Command |
| NAS501-6-46A | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-521-8071 is a Bolt,machine, manufactured by Naval Sea Systems Command, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-521-8071 has 1 manufacturer part number on file: 5749540 FIND 26 (Naval Sea Systems Command).
Key specifications for 5749540 FIND 26: Head Height: 0.203 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN; Fastener Length: 4.8125 INCHES MINIMUM AND 4.8593 INCHES MAXIMUM IN; Thread Length: 0.640 INCHES NOMINAL IN; Material Document and Classification: AMS 5645 NATIONAL STD/SPEC 1ST MATERIAL RESPONSE OR AMS 5646 NATIONAL STD/SPEC 2ND MATERIAL RESPONSE OVERALL. 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.