Bolt for rail joints of railway track GOST 11530-2014 with nut GOST 11532-2014 complete with track washer GOST 19115-91

Bolts with round head and oval subhead, accuracy class C, used for fastening of railway rails joints of types R38, R43, R50, R65 and R75 with double-headed plates, and for insulating joints with nuts of accuracy classes B and C, used for fastening of railway rails joints in a set with single-coil spring washers of accuracy class C, used in structures of railway overhead track