screws › machine screws
NAS1351-4-8P
MS16998-41 Socket Head Cap Screw
Description
Fastener Length: 1/2", Thread: 1/4-28, Head Width: 3/16", Thread Length: 29/64", NAS1351 series screw
Specifications
| Country of Origin | USA |
|---|---|
| Drilling | Undrilled Head |
| Fastener Length | 0.50 |
| Head Diameter | Between 0.365 inches and 0.375 inches |
| Head Height | Between 0.244 inches and 0.250 inches |
| Head Style | Flat chamfer |
| Head Type | Socket |
| Industry Standards/Certification | NAS1351 |
| Internal Drive Style | Hexagon |
| Length | .50, 1/2 in |
| Material | Steel |
| Material Specification | 66 federal standard single material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Minimum Yield Strength | 130000 pounds per square inch |
| Sold In | Per Package |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Fraction | 1/4-28 |
| Thread Length | 0.445 |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | Unf (fine thread) |
| Thread Size | 0.2500-28, 1/4 |
| Weight | 0.01 lb |
| 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.
- NAS1351-4-8P
- NAS1351-4-14P
- NAS1351-4-16P
- NAS1351-4-32P
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1351-4-8P. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error