The Screw,machine, cataloged under National Stock Number 5305-01-665-7286, 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 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-665-7286 |
| Primary Part Number | AESL4C500A50SB8A31 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| Head Height | 0.332 INCHES MINIMUM AND 0.355 INCHES MAXIMUM IN |
| Screw Surface Treatment | PASSIVATE |
| Fastener Length | 1.500 INCHES NOMINAL IN |
| Thread Length | 1.168 INCHES MINIMUM IN |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | ROUND |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 05047-ASMEB18.24-2015 NATIONAL STD/SPEC |
| Screw Material | STEEL COMP 304 |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 13 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.766 INCHES MINIMUM AND 0.813 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 |
|---|---|
| 91783A716 | Mcmaster-Carr Supply Co (USA) |
| AESL4C500A50SB8A31 PRIMARY | The American Society of Mechanical Engineers (USA) |
| ISO-1111 PRIMARY | Isometrics Inc (USA) |
| Reference | Meaning |
|---|---|
| B18.24-2004 | 5/1 Secondary reference The American Society of Mechanical Engineers |
NSN 5305-01-665-7286 is a Screw,machine, manufactured by The American Society of Mechanical Engineers, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-665-7286 has 3 manufacturer part numbers on file: 91783A716 (Mcmaster-Carr Supply Co), AESL4C500A50SB8A31 (The American Society of Mechanical Engineers), ISO-1111 (Isometrics Inc).
Key specifications for AESL4C500A50SB8A31: Head Height: 0.332 INCHES MINIMUM AND 0.355 INCHES MAXIMUM IN; Screw Surface Treatment: PASSIVATE; Fastener Length: 1.500 INCHES NOMINAL IN; Thread Length: 1.168 INCHES MINIMUM 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.