bolts › machine bolts
MS9557-16
Military Standard Machine Bolt
Description
Fastener Length: 1-1/8", Thread: 1/4-28, Thread Length: 51/64", MS9557 series bolt
Specifications
| Extended Washer Diameter | 0.438 |
|---|---|
| Extended Washer Thickness | 0.065 |
| Fastener Length | 1.125 |
| Features Provided | Finished head |
| Grip Length | Between 0.315 inches and 0.375 inches |
| Head Height | 0.300 |
| Head Style | Double hexagon w/hole |
| Length | 1 1/8 |
| Material | Iron |
| Material Specification | Ams 5731 assn standard single material response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.750 inches and 0.810 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 | 0.313 |
Cross-reference
No interchangeable or dimensionally similar parts are on record for MS9557-16. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error