The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-534-6583, 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 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-534-6583 |
| Primary Part Number | 91280A326 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Head Height | 4.0 MILLIMETERS NOMINAL MM |
| External Thread Tolerance Class | 6G G |
| Fastener Length | 16.0 MILLIMETERS NOMINAL MM |
| Thread Pitch in Millimeters | 1.0 |
| Thread Length | 16.0 MILLIMETERS NOMINAL MM |
| Hardness Rating | 22.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 6.0 MILLIMETERS MM |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 10.0 MILLIMETERS NOMINAL MM |
| Surface Treatment | ZINC OVERALL |
| Minimum Tensile Strength | 116000 POUNDS PER SQUARE INCH LBS |
| Material | STEEL PROPERTY CLASS 8.8 OVERALL |
| Thread Series Designator | M |
| 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 |
|---|---|
| 91280A326 PRIMARY | Mcmaster-Carr Supply Co (USA) |
| HSZSM506016-01 | Haulmark Trailers (australia) Pty Ltd (AUS) |
| ISO4017-M6X16-8.8-A2K PRIMARY | International Organization for Standardization (iso) (CHE) |
| 121PA1350-114 | Holmwood Highgate (aust) Pty Ltd (AUS) |
| U-VIS-14834 | Unac (FRA) |
| Reference | Meaning |
|---|---|
| 39064 | 5/1 Secondary reference Fastenal Company Dba Fastenal Co |
NSN 5305-01-534-6583 is a Screw,cap,hexagon Head, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-534-6583 has 5 manufacturer part numbers on file: 91280A326 (Mcmaster-Carr Supply Co), HSZSM506016-01 (Haulmark Trailers (australia) Pty Ltd), ISO4017-M6X16-8.8-A2K (International Organization for Standardization (iso)), 121PA1350-114 (Holmwood Highgate (aust) Pty Ltd), U-VIS-14834 (Unac).
Key specifications for 91280A326: Head Height: 4.0 MILLIMETERS NOMINAL MM; External Thread Tolerance Class: 6G G; Fastener Length: 16.0 MILLIMETERS NOMINAL MM; Thread Pitch in Millimeters: 1.0. 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.