NAS1351C5-20
Screw, Cap, Socket Head, 5/16-24 x 1-1/4, 300 CRES
| A | Head diameter (A) | Ø0.469" |
| B | Head height (H) | 0.312" |
| C | Key engagement (T) | 0.151" |
| D | Length (L) | 1.250" |
| E | Body diameter (D) | Ø0.3125" |
| F | Socket size (J) | 0.250" A/F |
| G | Thread | 5/16-24 |
Generated from the NAS1351/NAS1352 Rev 9 dimension table. Letters key to the table below. Dimensions in inches — reference only; consult the standard for tolerances.
Where to Buy
| Supplier | Price | Availability | Updated | |
|---|---|---|---|---|
Bisco Industries AS9100DAS9120B | — | Not orderable | 15 hours ago | View product ↗ |
Military Fasteners AS9120BISO 9001:2015 | $4.72/ EA | Not orderable | 15 hours ago | View product ↗ |
Only AS9100-series certified suppliers are listed, so every source here can provide lot traceability. “Available to order” means the supplier will accept an order — it does not confirm shelf stock. Quote-only listings require supplier confirmation of price and availability. Prices are the supplier's own as of the time shown and may have changed since; the supplier's page is authoritative.
Technical Specifications
| Category | screw |
|---|---|
| Thread size | 5/16-24 |
| Thread class | 3A |
| Threads per inch | 24 |
| Thread diameter | 0.3125" |
| Length | 1.25" |
| Body diameter / across flats | 0.3125" |
| Head diameter / across flats | 0.469" |
| Head height | 0.312" |
| Material | 300 CRES |
| Finish | Passivated |
| Head style | Socket Head |
| Drive type | Hex Socket |
| Tensile strength | 80 ksi |
| Chamfer (in) | 0.008 |
| Socket Size (in) | 0.25 |
| Thread Series | UNRF-3A |
| Socket Depth (in) | 0.151 |
| Thread Length (in) | 1.125 |
| Wall Thickness (in) | 0.119 |
| Head Side Height (in) | 0.281 |