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MS27576-4-20
Military Standard Machine Bolt
Description
Fastener Length: 1-11/16", Thread: 1/4-28, Thread Length: 21/64", MS27576 series bolt
Specifications
| Distance From Head Largest Bearing Surface To Shank Hole Center | 1.568 inches first hole and 1.598 inches first hole |
|---|---|
| Fastener Length | Between 1.668 inches and 1.688 inches |
| Grip Diameter | Between 0.2483 inches and 0.2492 inches |
| Grip Length | Between 1.250 inches and 1.266 inches |
| Hardness Rating | 36.0 rockwell c and 41.0 rockwell c |
| Head Height | Between 0.126 inches and 0.141 inches |
| Head Style | Dished hexagon |
| Material | Steel |
| Material Specification | Mil-b-83050 military specification single material response |
| Shank Unthreaded Hole Diameter | 0.076 inches first hole and 0.086 inches first hole |
| Special Features | W/retaining element on shank |
| Surface Finish | 63.0 microinches bearing surface of head, 63.0 microinches grip |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Qq-p-416 type 2 federal specification single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.282 inches and 0.333 inches |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNJF |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) |
| Thread Size | 1/4 |
| Width Between Flats | Between 0.430 inches and 0.439 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
No interchangeable or dimensionally similar parts are on record for MS27576-4-20. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error