screws › socket head cap screws
MS16997-30
Hexagon Socket Cap Screw
Description
Fastener Length: 1/4", Thread: 8-32, Head Width: 9/64", Thread Length: 1/4
Specifications
| Drive Style | Hexagon |
|---|---|
| Fastener Length | Between 0.219 inches and 0.250 inches |
| Finish | Cadmium ll |
| Hardness Rating | 36.0 rockwell c and 45.0 rockwell c |
| Head Diameter | Between 0.262 inches and 0.270 inches |
| Head Height | Between 0.159 inches and 0.164 inches |
| Head Style | Flat chamfer |
| Internal Drive Style | Hexagon |
| Length | 1/4 |
| 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 | 8-32 |
| 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 | 0.164 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.157 inches and 0.250 inches |
| Thread Qty | 32 |
| Thread Qty Per Inch (tpi) | 32 |
| Thread Series | UNC |
| Thread Series Designator | Unc (coarse thread) |
| Thread Type | N.C. - Coarse |
| Width Across Flats | Between 0.141 inches and 0.143 inches |
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for MS16997-30 — functionally equivalent.
- NAS1352-08-4P Listed alternate 32.00-32 · 1/4 in · Flat chamfer · Steel
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Catalog data updated 2026-07-05. Report a data error