STRIKER CASTING WEAR PLATE FOR BOXNHL/ BCNHL WAGONS. TO RDSO DRG. NO. WD- 87056- S- 1, ALT- 4. MATERIAL AND SPECIFICATION CONFIRMING TO IS- 3885: Part 1: 1992 ( REAFFIRMED YEAR: 2022 ) GR. IV ( 300- 340BHN ) AND OTHER TECHNICAL REQUIREMENTS CONFIRMING TO RDSO STR. NO. WD- 70- BD- 2010 ( REV. 03 OF MAY 2022 )