The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-421-5122, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is American Society of Mechanical Engineers Inc. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-421-5122 |
| Primary Part Number | AES01C625C00AW9LX1 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | American Society of Mechanical Engineers Inc |
| Status | ACTIVE |
| Head Height | 0.378 INCHES MINIMUM AND 0.444 INCHES MAXIMUM IN |
| Fastener Length | 3.000 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416, TY2 CL3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 1.500 INCHES NOMINAL IN |
| Material Document and Classification | ASTM A 354 GR BD ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.906 INCHES MINIMUM AND 0.928 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 11 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| AES01C625C00AW9LX1 | American Society of Mechanical Engineers Inc (USA) |
| Reference | Meaning |
|---|---|
| B1821AH063C300N | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-421-5122 is a Screw,cap,hexagon Head, manufactured by American Society of Mechanical Engineers Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-421-5122 has 1 manufacturer part number on file: AES01C625C00AW9LX1 (American Society of Mechanical Engineers Inc).
Key specifications for AES01C625C00AW9LX1: Head Height: 0.378 INCHES MINIMUM AND 0.444 INCHES MAXIMUM IN; Fastener Length: 3.000 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416, TY2 CL3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 1.500 INCHES NOMINAL IN. 13 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.