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MS27576-4-40
Military Standard Bolt
Description
Fastener Length: 2-15/16", Thread: 1/4-28, Thread Length: 21/64"
Specifications
| Distance From Head Largest Bearing Surface To Shank Hole Center | 2.818 inches minimum first hole and 2.848 inches maximum first hole |
|---|---|
| Fastener Length | 2.918 inches minimum and 2.938 inches maximum |
| Grip Diameter | 0.2483 inches minimum and 0.2492 inches maximum |
| Grip Length | 2.500 inches minimum and 2.516 inches maximum |
| Hardness Rating | 36.0 rockwell c minimum and 41.0 rockwell c maximum |
| Head Height | 0.126 inches minimum and 0.141 inches maximum |
| Head Style | Dished hexagon |
| Length | 2 15/16 |
| Material | Steel |
| Min. Tensile Strength (psi) | 95000 pounds per square inch |
| Shank Unthreaded Hole Diameter | 0.076 inches minimum first hole and 0.086 inches maximum first hole |
| Special Features | Retaining element in shank |
| Surface Finish | 63.0 microinches bearing surface of head, 63.0 microinches grip |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416,ty 2,cl 2 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.282 inches minimum and 0.333 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
| Width Between Flats | 0.430 inches minimum and 0.439 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
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.
- MS27576-4-39 MS 1/4-28 · 0.086 in · Dished hexagon · Steel
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Catalog data updated 2026-07-05. Report a data error