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MS27039-4-04
Military Standard Machine Screw
Description
cadmium plated steel length: 0.406", grip: 0.032", thread: 1/4-28, pan head structural machine screw
Specifications
| Fastener Length | 0.266 inches minimum and 0.313 inches maximum |
|---|---|
| Head Diameter | 0.473 inches minimum and 0.492 inches maximum |
| Head Height | 0.162 inches minimum and 0.175 inches maximum |
| Head Style | Pan Head |
| Internal Drive Style | Cross recess type 1 |
| Length | 5/16 |
| Material | Steel |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| Screw Material | Steel comp hnv-2 or steel comp 4037 |
| Screw Surface Treatment Specification | Qq-p-416,type 2,class 3 fed spec all treatment responses |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.281 inches minimum and 0.313 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
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.
- NAS1100-4-5 NAS 1/4-28 · 5/16 in · Pan Head · Steel
- NAS1101E4-5 NAS 1/4-28 · 5/16 in · Pan Head · Iron
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Catalog data updated 2026-07-05. Report a data error