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MS16997-80
5/16-18X1 MS16997 Military Socket Head Cap Screw Cadmium Yellow DFAR
Description
Fastener Length: 63/64", Thread: 1/4-18, Head Width: 1/4", Thread Length: 7/8
Specifications
| Country of Origin | USA |
|---|---|
| Diameter | 5/16 |
| Drive | Socket |
| Fastener Length | 0.969 inches minimum and 1.000 inches maximum |
| Finish | Cadmium Yellow, Cadmium ll |
| Full Size | 5/16-18 x 1 |
| Hardness Rating | 36.0 rockwell c minimum and 45.0 rockwell c maximum |
| Head Angle | 100 ? |
| 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 |
| Industry Standards/Certification | AN507 |
| Internal Drive Style | Hexagon |
| Length | 0 63/64, 1 |
| Material | Steel |
| MilspecPart | MS16997 |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Minimum Yield Strength | 160000 pounds per square inch |
| 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 | 0.858 inches minimum and 0.889 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 |
| Weight | .005 lb |
| Width Across Flats | 0.250 inches minimum and 0.253 inches maximum |
Cross-reference
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Catalog data updated 2026-07-05. Report a data error