The Bolt,machine, cataloged under National Stock Number 5306-00-452-3522, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Bsi Standards Limited. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-452-3522 |
| Primary Part Number | A25-2B |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Bsi Standards Limited |
| Status | ACTIVE |
| Head Height | 0.080 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN |
| Fastener Length | 0.560 INCHES MINIMUM AND 0.600 INCHES MAXIMUM IN |
| Thread Length | 0.360 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 3.6 MILLIMETERS MM |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.160 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN |
| Width Between Flats | 0.243 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL OVERALL |
| Thread Series Designator | BA |
| 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 |
|---|---|
| A25-2B PRIMARY | Bsi Standards Limited (GBR) |
| Reference | Meaning |
|---|---|
| 99-1008149 | 6/9 Informative reference only U.S. Government activity |
NSN 5306-00-452-3522 is a Bolt,machine, manufactured by Bsi Standards Limited, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-452-3522 has 1 manufacturer part number on file: A25-2B (Bsi Standards Limited).
Key specifications for A25-2B: Head Height: 0.080 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN; Fastener Length: 0.560 INCHES MINIMUM AND 0.600 INCHES MAXIMUM IN; Thread Length: 0.360 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN; Nominal Thread Diameter: 3.6 MILLIMETERS MM. 12 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.