supply of heavy duty bottom block/snatch blockheavy duty bottom block/snatch block,heavy duty bottom block/snatch block assembly for eot cranes. capacity- 20 tons, c type ho ok with lock, latch and nut confirming to is- 1875/1992. material as per drawing no. 614/0004a3051. note:- following test certificate should be submitted at the time of delivery. 1. dpt test certificate of forged machined hook with nut and cross head. 2. ultrasonic test certificate of hook with nut and cross head.. 3. c hemical composition and physical properties of the material confirming class-2 of is :1875/1992 steel 4. cal ibration certificate from nabl approved laboratory. [ warranty period: 30 months after the date of delive ry ] ]