The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-691-4853, 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 17 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 | 5305-01-691-4853 |
| Primary Part Number | AES43M407012BC4A81 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| Width Across Flats | 3.0 MILLIMETERS NOMINAL MM |
| Head Height | 3.88 MILLIMETERS MINIMUM AND 4.00 MILLIMETERS MAXIMUM MM |
| Fastener Length | 12.0 MILLIMETERS NOMINAL MM |
| Surface Treatment Document and Classification | ASTM B633,TY II,SC 1 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Pitch in Millimeters | 0.7 |
| Thread Length | 12.0 MILLIMETERS NOMINAL MM |
| Material Document and Classification | ASTM A574M AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 4.0 MILLIMETERS MM |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 05047-ASME B18.24-2015 NATIONAL STD/SPEC |
| Surface Treatment | ZINC OVERALL |
| Chamfer Angle | 0.40 RADIANS MAXIMUM |
| Internal Drive Style | HEXAGON |
| Material | STEEL OVERALL |
| Thread Series Designator | M |
| Head Diameter | 6.80 MILLIMETERS MINIMUM AND 7.00 MILLIMETERS MAXIMUM MM |
| 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 |
|---|---|
| AES43M407012BC4A81 PRIMARY | The American Society of Mechanical Engineers (USA) |
NSN 5305-01-691-4853 is a Screw,cap,socket Head, manufactured by The American Society of Mechanical Engineers, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-691-4853 has 1 manufacturer part number on file: AES43M407012BC4A81 (The American Society of Mechanical Engineers).
Key specifications for AES43M407012BC4A81: Width Across Flats: 3.0 MILLIMETERS NOMINAL MM; Head Height: 3.88 MILLIMETERS MINIMUM AND 4.00 MILLIMETERS MAXIMUM MM; Fastener Length: 12.0 MILLIMETERS NOMINAL MM; Surface Treatment Document and Classification: ASTM B633,TY II,SC 1 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 17 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.