The Screw,machine, cataloged under National Stock Number 5305-01-533-5620, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-533-5620 |
| Primary Part Number | 91857A831 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Head Height | 0.137 INCHES NOMINAL IN |
| Fastener Length | 0.750 INCHES NOMINAL IN |
| Thread Length | 0.750 INCHES NOMINAL IN |
| Hardness Rating | 85.0 ROCKWELL B MINIMUM AND 95.0 ROCKWELL B MAXIMUM |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | ROUND |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL COMP 316 |
| Minimum Tensile Strength | 85000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | SLOT |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNF |
| Head Diameter | 0.359 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 |
|---|---|
| 91857A831 | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 2-SRM-10F-75 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-533-5620 is a Screw,machine, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-533-5620 has 1 manufacturer part number on file: 91857A831 (Mcmaster-Carr Supply Co).
Key specifications for 91857A831: Head Height: 0.137 INCHES NOMINAL IN; Fastener Length: 0.750 INCHES NOMINAL IN; Thread Length: 0.750 INCHES NOMINAL IN; Hardness Rating: 85.0 ROCKWELL B MINIMUM AND 95.0 ROCKWELL B MAXIMUM. 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.