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MS27039-4-18
Machine Screw
Description
Machine Screw
Specifications
| Alternate Part Number | NAS222-18 |
|---|---|
| Country of Origin | USA |
| Fastener Length | Between 1.141 inches and 1.188 inches |
| Hardness Rating | Between 26 rockwell c and 32 rockwell c |
| Head Angle | 100 ? |
| Head Diameter | Between 0.473 inches and 0.492 inches |
| Head Height | Between 0.162 inches and 0.175 inches |
| Head Style | Pan Head |
| Industry Standards/Certification | AN507 |
| Internal Drive Style | Cross recess type 1 |
| Material | Steel |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| NIIN | 00-839-7091 |
| NSN | 5305-00-839-7091 |
| Screw Material | Steel comp 8630 or steel comp 4037 |
| Screw Surface Treatment | Cadmium and chromate |
| Screw Surface Treatment Specification | Class 3 federal specification all treatment responses type 2 qq-p-416 |
| Thread Class | 3a |
| Thread Diameter | 0.25 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.43 inches and 0.578 inches |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNF |
| Thread Series Designator | Unf (fine thread) |
| Thread Size | 1/4 |
| Weight | 0.02 lb |
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.
- MS27039C4-18 MS 1/4-28 · 1-3/16 in · Pan Head · Iron
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Catalog data updated 2026-07-05. Report a data error