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MS16997-61
Hexagon Socket Cap Screw
Description
Fastener Length: 7/8", Thread: 1/4-20, Head Width: 3/16", Thread Length: 55/64", coarse thread, MS16997 series screw
Specifications
| Drive Style | Hexagon |
|---|---|
| Fastener Length | Between 0.844 inches and 0.875 inches |
| Finish | Cadmium ll |
| Hardness Rating | 36.0 rockwell c and 45.0 rockwell c |
| 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 | 7/8 |
| Material | Steel |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Minimum Yield Strength | 130000 pounds per square inch |
| Nondefinitive Specification/Std Data | 6 type |
| Size | 1/4-20 |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Cl 3 federal specification all treatment responses type 2 qq-p-416 |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.744 inches and 0.874 inches |
| Thread Qty | 20 |
| Thread Qty Per Inch (tpi) | 20 |
| Thread Series | UNC |
| Thread Series Designator | Unc (coarse thread) |
| Thread Size | 1/4 |
| Thread Type | N.C. - Coarse |
| Width Across Flats | Between 0.188 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.
- MS16995-51 MS 1/4-20 · 7/8 in · Flat chamfer · CRES
- MS16997-61L MS 1/4-20 · 7/8 in · Flat chamfer · Steel
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Catalog data updated 2026-07-05. Report a data error