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MS16998-55
Hexagon Socket Cap Screw
Description
Fastener Length: 1/2", Thread: 1/4-24, Head Width: 1/4", Thread Length: 1/2"
Specifications
| Fastener Length | 0.469 inches minimum and 0.500 inches maximum |
|---|---|
| Finish | Cadmium ll |
| Hardness Rating | 36.0 rockwell c minimum and 45.0 rockwell c maximum |
| Head Diameter | 0.457 inches minimum and 0.468 inches maximum |
| Head Height | 0.306 inches minimum and 0.312 inches maximum |
| Head Style | Flat chamfer |
| Internal Drive Style | Hexagon |
| Length | 1/2 |
| Material | Steel |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Minimum Yield Strength | 130000 pounds per square inch |
| Size | 5/16-24 |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 ty 2 cl 3 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | 0.469 inches minimum and 0.500 inches maximum |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
| Thread Type | N.F. - Fine |
| Width Across Flats | 0.250 inches minimum and 0.253 inches maximum |
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.
- NAS1351-5-8P NAS 1/4-24 · 1/2 in · Flat chamfer · Steel
- NAS1351C5-8 NAS 1/4-24 · 1/2 in · Flat chamfer · CRES
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Catalog data updated 2026-07-05. Report a data error