supply of ms square tube , ms square tube 45 x 45 x 2.6 mm to specn is : 4923-2017 with amend no.3, issued on june - 2024 ,hf shs/ grade-yst 240 with plain carbon steel with minimum carbon of 0.15 % (or) steel with equivalent carbon content of maximum 0.39 % in spectfic length of 6.14 mts in excess length in multiples of 0.77 mts up to a max length of 7. 68 mts. the tube shall be oiled externally with rust preventive oil. [ warranty period: 30 months after the date of de livery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ] , ms square tube size 20 x 20 x 1.6 mm to specn is :4923-2017 with amend no.3, issued on june 2024 hf sh s/grade-yst 240 with plain carbon steel with minimum carbon of 0.15 % (or) steel with equivalent carbon conten t of maximum 0.39 % in spectfic length of 6.14 mts in excess length in multiples of 0.77 mts up to a max length of 7.68 mts. the tube shall be oiled externally with rust preventive oil. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]