screws › socket head cap screws
NAS1351C4LL6
Socket Head Screw
Description
Fastener Length: 1-3/4", Thread: 1/4-28, Head Width: 3/16", Thread Length: 1-"
Specifications
| Fastener Length | 1.750 |
|---|---|
| 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 3/4 |
| Material | Steel |
| Material Specification | Nas1351 national spec single material response |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Ams2700,method 1,type 6 or 7,class 1 assn std single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 1.000 |
| 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
- NAS1351C4LL18 NAS 1/4-28 · 0.073 in · Flat chamfer · Steel
- NAS1351N4LE20 NAS 1/4-28 · 0.073 in · Flat chamfer · Iron
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Catalog data updated 2026-07-05. Report a data error