The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-678-9268, 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 16 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-678-9268 |
| Primary Part Number | AES16K625B25DG5L81 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| Width Across Flats | 0.375 INCHES NOMINAL IN |
| Head Height | 0.324 INCHES NOMINAL IN |
| Fastener Length | 2.25 INCHES NOMINAL IN |
| Thread Length | 1.926 INCHES NOMINAL IN |
| Hardness Rating | 44.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | BLACK CHEMICAL FINISH OVERALL |
| Minimum Tensile Strength | 135000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Countersink Angle | 0.82 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 1.188 INCHES NOMINAL 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 |
|---|---|
| AES16K625B25DG5L81 PRIMARY | The American Society of Mechanical Engineers (USA) |
| 91253A874 | Mcmaster-Carr Supply Co (USA) |
NSN 5305-01-678-9268 is a Screw,cap,socket Head, manufactured by The American Society of Mechanical Engineers, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-678-9268 has 2 manufacturer part numbers on file: AES16K625B25DG5L81 (The American Society of Mechanical Engineers), 91253A874 (Mcmaster-Carr Supply Co).
Key specifications for AES16K625B25DG5L81: Width Across Flats: 0.375 INCHES NOMINAL IN; Head Height: 0.324 INCHES NOMINAL IN; Fastener Length: 2.25 INCHES NOMINAL IN; Thread Length: 1.926 INCHES NOMINAL IN. 16 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.