The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-00-021-6410, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-00-021-6410 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.750 INCHES NOMINAL IN |
| Fastener Length | 3.000 INCHES NOMINAL IN |
| Thread Length | 2.250 INCHES MINIMUM AND 2.438 INCHES MAXIMUM IN |
| Hardness Rating | 207.0 BRINELL STANDARD MAXIMUM OVERALL |
| Material Document and Classification | SAE GR 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 1.000 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Departure From Cited Designator | AS MODIFIED BY HEAD HEIGTH AND WIDTH BETWEEN FLATS |
| Width Between Flats | 1.312 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | 2 TYPE AND 10 STYLE |
| Minimum Tensile Strength | 55000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 28000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 14 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 216410 | 3/9 Design control — primary reference General Motors Corp |
| FFS85TYPE2STYLE10PGRADE2 | 4/1 Identification reference U.S. Government activity |
| 216410 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| 1X1012 | 5/9 Secondary reference Fruehauf Corp Hobbs Div |
NSN 5305-00-021-6410 is a Screw,cap,hexagon Head, classified under FSC 5305, Screws. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6750-01-427-2365. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-00-021-6410: Head Height: 0.750 INCHES NOMINAL IN; Fastener Length: 3.000 INCHES NOMINAL IN; Thread Length: 2.250 INCHES MINIMUM AND 2.438 INCHES MAXIMUM IN; Hardness Rating: 207.0 BRINELL STANDARD MAXIMUM OVERALL. 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.