The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-590-6743, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Fastenal Company Dba Fastenal Co. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-590-6743 |
| Primary Part Number | 20909 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Fastenal Company Dba Fastenal Co |
| Status | ACTIVE |
| Head Height | 0.548 INCHES MINIMUM AND 0.577 INCHES MAXIMUM IN |
| Fastener Length | 10.820 INCHES MINIMUM AND 11.000 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ASTM F1941 FE/ZN 5C ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 2.000 INCHES NOMINAL IN |
| Hardness Rating | 38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.100 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN |
| Color | YELLOW OVERALL |
| Surface Treatment | ZINC OVERALL |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 159500 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 8637 OR STEEL COMP 8640 OVERALL |
| Thread Series Designator | UNRC |
| 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 |
|---|---|
| 20909 PRIMARY | Fastenal Company Dba Fastenal Co (USA) |
| 12759-01061 PRIMARY | Fastenal Company Dba Fastenal Co (USA) |
NSN 5305-01-590-6743 is a Screw,cap,hexagon Head, manufactured by Fastenal Company Dba Fastenal Co, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-590-6743 has 2 manufacturer part numbers on file: 20909 (Fastenal Company Dba Fastenal Co), 12759-01061 (Fastenal Company Dba Fastenal Co).
1 possible match (shared part number, not a government interchangeability claim): 7125-01-674-1951. Verify interchangeability with system specifications before substitution.
Key specifications for 20909: Head Height: 0.548 INCHES MINIMUM AND 0.577 INCHES MAXIMUM IN; Fastener Length: 10.820 INCHES MINIMUM AND 11.000 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ASTM F1941 FE/ZN 5C ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 2.000 INCHES NOMINAL IN. 17 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.