Specification :

1. square, rectangular, hex and dome heads
2. dimensions from 5/ 8 inch thru 1-1/ 8 inch
3. medium carbon steel not heat treated or medium carbon steel heat treated to A-325 specifications.
4. spring washers and screw inserts are available .
5. other specifications available based on your drawings.
6.Applied on railway lines equipment with wooden sleeper , turn-outs, and switches.