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MS16997-78
5/16-18X3/4 MS16997 Military Socket Head Cap Screw Cadmium Yellow DFAR
Description
Fastener Length: 3/4", Thread: 1/4-18, Head Width: 1/4", Thread Length: 3/4", MS16997 series screw
Specifications
| Diameter | 5/16 |
|---|---|
| Drive | Socket |
| Fastener Length | 0.719 inches minimum and 0.750 inches maximum |
| Finish | Cadmium Yellow, Cadmium ll |
| Full Size | 5/16-18 x 3/4 |
| 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, Socket Head |
| Internal Drive Style | Hexagon |
| Length | 3/4 |
| Material | Steel |
| MilspecPart | MS16997 |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Minimum Yield Strength | 130000 pounds per square inch |
| Nondefinitive Specification/Std Data | 6 type |
| Size | 5/16-18 |
| 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 | 0.608 inches minimum and 0.750 inches maximum |
| Thread Qty | 18 |
| Thread Qty Per Inch (tpi) | 18 |
| Thread Series Designator | UNC |
| Thread Size | 1/4 |
| Thread Type | N.C. - Coarse, UNC |
| Threads Per Inch | 18 |
| U.O.M. | Imperial |
| Width Across Flats | 0.250 inches minimum and 0.253 inches maximum |
Cross-reference
No interchangeable or dimensionally similar parts are on record for MS16997-78. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error