... 1435mm, ZW 687, ZW700;6. Insulator: Pandrol series #7,#8, #9, #11,#12, #13 Nylon insulators;7. Lock washers: wL20, WL24, Wl22 ... , Fe6;8. Plain washer: Uls6, Uls7;9. Nut: Nlyon nut, hex nut, square nut, heavy and normal ... ;10. Rail casting shoulders for pandrol type clips;11. Tie plate: Cast AREMA Rail base plates and UIC standard ...