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MS16996-21
1/2 Inch Length MS16996 Undrilled Socket Head Screw
Description
Fastener Length: 1/2", Thread: 1/4-28, Head Width: 3/16", Thread Length: 1/2", MS16996 series screw
Specifications
| Alternate Part Number | NAS1351-C4-8 |
|---|---|
| Country of Origin | USA |
| Drilling | Undrilled Head |
| Drive Style | Hexagon |
| Fastener Length | Between 0.470 inches and 0.500 inches |
| Finish | Passivate |
| 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 |
| Head Type | Socket |
| Industry Standards/Certification | MS16996 |
| Internal Drive Style | Hexagon |
| Length | 1/2 |
| Material | CRES |
| Material Specification | 66 federal standard all material responses |
| Min. Tensile Strength (psi) | 80000 pounds per square inch |
| Minimum Yield Strength | 30000 pounds per square inch |
| Nondefinitive Specification/Std Data | 6 type |
| Size | 1/4-28 |
| Sold In | Per Package |
| 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 | UNF |
| Thread Series Designator | Unf (fine thread) |
| Thread Size | 0.2500-28, 1/4 |
| Thread Type | N.F. - Fine |
| Weight | .005 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.
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for MS16996-21 — functionally equivalent.
- NAS1351C4-8 Listed alternate 1/4-28 · 1/2 in · Flat chamfer · Steel
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Catalog data updated 2026-07-05. Report a data error