Set Of Bellow Bolt With Flat And Spring Washers For Traction Motor. Set Consists Of 3 Items. 1) Hexagonal Bolt M12 X 25Mm X 1.75 Pitch And 8.8 Grade As Per Is: 1364 (Part-1) 2002. Qty-01 No/Set. 2) Flat Washer M12 As Per Is: 2016: 2001. Qty-02 Nos/Set. 3) Rectangular Section Spring Washer Type-B, M12 As Per Is: 3063: 1994. Qty-02 Nos/Set. Hex. Note: Screw And Flat Washer Are To Be Zinc Plated As Per Is:1573/1986 And Spring Washer Is To Be Phosphated As Per Is:3618/86.