screws › socket head cap screws
NAS1351C4LL18
Socket Head Screw
Description
Fastener Length: 1-1/8", Thread: 1/4-28, Head Width: 3/16", Thread Length: 1-"
Specifications
| Fastener Length | 1.125 |
|---|---|
| Head Diameter | 0.365 inches minimum and 0.375 inches maximum |
| Head Height | 0.244 inches minimum and 0.250 inches maximum |
| Head Style | Flat chamfer |
| Internal Drive Style | Hexagon |
| Length | 1 1/8 |
| Locking Feature | Strip threads |
| Material | Steel |
| Material Specification | Ff-s-86 fed std single material response |
| Min. Tensile Strength (psi) | 80000 pounds per square inch |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 1.000 inches minimum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNRF |
| Thread Size | 1/4 |
| Width Across Flats | 0.188 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- NAS1351-4-18P NAS 1/4-28 · 0.073 in · Flat chamfer · Steel
- NAS1351-4-20P NAS 1/4-28 · 0.073 in · Flat chamfer · Steel
- NAS1351-4LB24P NAS 1/4-28 · 0.073 in · Flat chamfer · Plastic
- NAS1351-4LL28P NAS 1/4-28 · 0.073 in · Flat chamfer · Plastic
- NAS1351C4-18 NAS 1/4-28 · 0.073 in · Flat chamfer · CRES
- NAS1351C4-24P NAS 1/4-28 · 0.073 in · Flat chamfer · Steel
- NAS1351C4-28 NAS 1/4-28 · 0.073 in · Flat chamfer · CRES
- NAS1351C4LL6 NAS 1/4-28 · 0.073 in · Flat chamfer · Steel
- NAS1351N4LE20 NAS 1/4-28 · 0.073 in · Flat chamfer · Iron
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error