screws › socket head cap screws
NAS1351C4-8
Socket Head Cap Screw
Description
Fastener Length: 31/64", Thread: 1/4-28, Head Width: 3/16", Thread Length: 13/32", NAS1351 series screw
Specifications
| Drive Style | Hexagon |
|---|---|
| Fastener Length | Between 0.470 inches and 0.500 inches |
| Hardness Rating | 80.0 rockwell b |
| Head Diameter | Between 0.365 inches and 0.375 inches |
| Head Height | Between 0.244 inches and 0.250 inches |
| Head Style | Flat chamfer |
| Internal Drive Style | Hexagon |
| Length | 1/2 |
| Material | Steel |
| Material Specification | 66 federal standard 1st material response or 66 federal standard 2nd material response or 66 federal standard 3rd material response or 66 federal standard 4th material response or 66 federal standard 5th material response or astm a493 assn standard 6th material response |
| Min. Tensile Strength (psi) | 80000 pounds per square inch |
| Minimum Yield Strength | 30000 pounds per square inch |
| Specification Data | 80205-nas1351 professional/industrial association standard |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 federal specification single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.399 inches and 0.500 inches |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNRF |
| Thread Series Designator | UNRF |
| Thread Size | 1/4 |
| Width Across Flats | Between 0.188 inches and 0.190 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for NAS1351C4-8 — functionally equivalent.
- MS16996-21 Listed alternate 28.00-28 · 1/2 in · Flat chamfer · CRES
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- NAS1351-4-8 NAS 1/4-28 · 1/2 in · Flat chamfer · Steel
- NAS1351-4LE8P NAS 1/4-28 · 1/2 in · Flat chamfer · Plastic
- NAS1351C4-8P NAS 1/4-28 · 1/2 in · Flat chamfer · CRES
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Catalog data updated 2026-07-05. Report a data error