The Screw,machine, cataloged under National Stock Number 5305-01-586-6540, 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 | 5305-01-586-6540 |
| Primary Part Number | 91800A228 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Head Height | 2.6 MILLIMETERS NOMINAL MM |
| External Thread Tolerance Class | 6G G |
| Fastener Length | 20.0 MILLIMETERS NOMINAL MM |
| Thread Pitch in Millimeters | 0.7 |
| Thread Length | 20.0 MILLIMETERS NOMINAL MM |
| Hardness Rating | 80.0 ROCKWELL B MINIMUM |
| Nominal Thread Diameter | 4.0 MILLIMETERS MM |
| Head Style | PAN |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL CORROSION RESISTING |
| Minimum Tensile Strength | 72000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | SLOT |
| Thread Series Designator | M |
| Head Diameter | 7.0 MILLIMETERS NOMINAL 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 |
|---|---|
| 91800A228 PRIMARY | Mcmaster-Carr Supply Co (USA) |
NSN 5305-01-586-6540 is a Screw,machine, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-586-6540 has 1 manufacturer part number on file: 91800A228 (Mcmaster-Carr Supply Co).
Key specifications for 91800A228: Head Height: 2.6 MILLIMETERS NOMINAL MM; External Thread Tolerance Class: 6G G; Fastener Length: 20.0 MILLIMETERS NOMINAL MM; Thread Pitch in Millimeters: 0.7. 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.