bolts › machine bolts
MS21289-05
Military Standard Machine Bolt
Description
Fastener Length: 7/16", Hole Diameter: 1/16", Thread: 1/4-28, Thread Length: 7/16
Specifications
| Extended Washer Diameter | 0.438 |
|---|---|
| Extended Washer Thickness | Between 0.060 inches and 0.070 inches |
| Fastener Length | 0.438 |
| Features Provided | Finished head |
| Head Height | 0.330 |
| Head Style | Double hexagon extended washer |
| Hole Configuration Style | Double hexagon flats |
| Hole Diameter | 0.062 |
| Hole Quantity | 4 |
| Hole Type | Drilled |
| Length | 7/16 |
| Material | Iron |
| Material Specification | Ams 5737 assn standard single material response |
| Surface Treatment | Passivate |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.438 |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNF |
| Thread Series Designator | Unf (fine thread) |
| Thread Size | 1/4 |
| Width Between Flats | Between 0.304 inches and 0.313 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- MS21289-05
- MS21289-08
- MS21289-10
- MS21289-12
- MS21289-23
- MS21289-24
- MS21289-27
Cross-reference
No interchangeable or dimensionally similar parts are on record for MS21289-05. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error