The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-645-3000, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The American Society of Mechanical Engineers. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-645-3000 |
| Primary Part Number | AES14F250A25BB3A86 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| Width Across Flats | 0.188 INCHES NOMINAL IN |
| Head Height | 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Fastener Length | 1.250 INCHES NOMINAL IN |
| Thread Length | 1.250 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | ZINC OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL UNS K03104 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| 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 |
|---|---|
| AES14F250A25BB3A86 PRIMARY | The American Society of Mechanical Engineers (USA) |
| Reference | Meaning |
|---|---|
| B.18.24-2004 | 3/1 Design control — primary reference The American Society of Mechanical Engineers |
NSN 5305-01-645-3000 is a Screw,cap,socket Head, manufactured by The American Society of Mechanical Engineers, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-645-3000 has 1 manufacturer part number on file: AES14F250A25BB3A86 (The American Society of Mechanical Engineers).
Key specifications for AES14F250A25BB3A86: Width Across Flats: 0.188 INCHES NOMINAL IN; Head Height: 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; Fastener Length: 1.250 INCHES NOMINAL IN; Thread Length: 1.250 INCHES NOMINAL IN. 14 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.