The Screw,machine, cataloged under National Stock Number 5305-01-561-5447, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-561-5447 |
| Primary Part Number | 90910A540 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Head Height | 0.132 INCHES NOMINAL IN |
| Fastener Length | 0.750 INCHES NOMINAL IN |
| Thread Length | 0.750 INCHES NOMINAL IN |
| Hardness Rating | 60.0 ROCKWELL B MINIMUM |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | BUTTON |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL |
| Minimum Tensile Strength | 60000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | TORX |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.437 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 |
|---|---|
| 90910A540 PRIMARY | Mcmaster-Carr Supply Co (USA) |
NSN 5305-01-561-5447 is a Screw,machine, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-561-5447 has 1 manufacturer part number on file: 90910A540 (Mcmaster-Carr Supply Co).
Key specifications for 90910A540: Head Height: 0.132 INCHES NOMINAL IN; Fastener Length: 0.750 INCHES NOMINAL IN; Thread Length: 0.750 INCHES NOMINAL IN; Hardness Rating: 60.0 ROCKWELL B MINIMUM. 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.