Nylon Insulation for Gauge Tie Plate complete consisting of ( a ) Insulation plate to DRG. No. T. 10372 Alt- 2 or latest- 01 no, ( b ) Insulating bush to Drg. No. T- 10368 Alt- 1 or latest- 03 nos. ( c ) Insulating washer to Drg. No. T. 10371 Alt- 2- 06 nos. as per spec. IRS- S- 40/ 84.