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MS16997-18
1/4 Inch Length MS16997 Undrilled Socket Head Screw
Description
Fastener Length: 1/4", Thread: 6-32, Head Width: 7/64", Thread Length: 7/32", flat head, coarse thread, alloy steel, cadmium yellow, MS16997 series screw
Specifications
| Alternate Part Number | NAS1352-06-4P |
|---|---|
| Country of Origin | USA |
| Diameter | #6 |
| Drilling | Undrilled Head |
| Drive | Socket |
| Drive Style | Hexagon |
| Fastener Length | Between 0.219 inches and 0.250 inches |
| Finish | Cadmium Yellow, Cadmium ll |
| Full Size | #6-32 x 1/4 |
| Hardness Rating | 36.0 rockwell c and 45.0 rockwell c |
| Head Diameter | Between 0.218 inches and 0.226 inches |
| Head Height | Between 0.134 inches and 0.138 inches |
| Head Style | Flat chamfer, Socket Head |
| Head Type | Socket |
| Industry Standards/Certification | MS16997 |
| Internal Drive Style | Hexagon |
| Length | 1/4 |
| Material | Steel |
| Material Specification | 66 federal standard single material response |
| MilspecPart | MS16997 |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Minimum Yield Strength | 130000 pounds per square inch |
| Size | 6-32 |
| Sold In | EA |
| 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 | 0.138 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.157 inches and 0.219 inches |
| Thread Qty | 32 |
| Thread Qty Per Inch (tpi) | 32 |
| Thread Series | UNC |
| Thread Series Designator | Unc (coarse thread) |
| Thread Size | 0.1380-32, 6 |
| Thread Type | N.C. - Coarse, UNC |
| Threads Per Inch | 32 |
| U.O.M. | Imperial |
| Weight | .005 lb |
| Width Across Flats | Between 0.109 inches and 0.111 inches |
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for MS16997-18 — functionally equivalent.
- NAS1352-06-4P Listed alternate 1/4 in · Flat chamfer · Steel
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Catalog data updated 2026-07-05. Report a data error