The Screw,machine, cataloged under National Stock Number 5305-00-902-7487, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Bsi Standards Limited. Government technical data includes 11 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-902-7487 |
| Primary Part Number | A25-1B |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Bsi Standards Limited |
| Status | ACTIVE |
| Head Height | 0.080 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN |
| Screw Surface Treatment | CADMIUM |
| Fastener Length | 0.500 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN |
| Thread Pitch in Millimeters | 0.66 |
| Thread Length | 0.400 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 3.6 MILLIMETERS MM |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.243 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN |
| Screw Material | STEEL |
| 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 |
|---|---|
| A25-1B PRIMARY | Bsi Standards Limited (GBR) |
NSN 5305-00-902-7487 is a Screw,machine, manufactured by Bsi Standards Limited, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-902-7487 has 1 manufacturer part number on file: A25-1B (Bsi Standards Limited).
Key specifications for A25-1B: Head Height: 0.080 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN; Screw Surface Treatment: CADMIUM; Fastener Length: 0.500 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN; Thread Pitch in Millimeters: 0.66. 11 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.