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MS16998-45
Hexagon Socket Cap Screw
Description
MS 16998-45 Hexagon Socket Cap Screw
Specifications
| Alternate Part Number | Possible NAS1315-4-16P |
|---|---|
| Country of Origin | USA |
| Drilling | Undrilled Head |
| Drive Style | Hexagon |
| Fastener Length | Between 0.969 inches and 1.000 inches |
| Finish | Cadmium ll |
| Hardness Rating | 36.0 rockwell c and 45.0 rockwell c |
| Head Angle | 100 ? |
| 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 | MS16998 |
| Internal Drive Style | Hexagon |
| Length | 1 |
| Material | Steel |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Minimum Yield Strength | 130000 pounds per square inch |
| NIIN | 00-983-6662 |
| NSN | 5305-00-983-6662 |
| Size | 1/4-28 |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 type 2 cl 3 federal specification single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.969 inches and 1.000 inches |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNF |
| Thread Series Designator | Unf (fine thread) |
| Thread Size | 0.2500-28 |
| Thread Type | N.F. - Fine |
| Weight | .005 lb |
| Width Across Flats | Between 0.187 inches and 0.190 inches |
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.
- NAS1351-4-16P NAS 28.00-28 · 0.073 in · Flat chamfer · Steel
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Catalog data updated 2026-07-05. Report a data error