supply of set of two different hex. head bolts(zinc coated) sizes required for maintenance of transformer top plate fixing in 3-phase locomotivesset of two different hex. head bolts(zinc coated) sizes required for maintenance of transformer top plate fixing in 3-phase locomotives,set of two different hex. head bolts(zinc coated) sizes required for maintenance of transfor mer top plate fixing in 3-phase locomotives as follows. (1) set of hex head bolt full threaded size: m10 x 30 mm, pitch: 1.50mm, grade: 8.8 as per is: 1364(part-2) along with suitable one m10 nut, grade: 8.0 as per i s: 1364(part-3), two flat washers having id: 11mm, od: 28mm, thickness: 2.5mm and one spring washer as per is: 3063. qty/set. = 01 set. (2) set of hex head bolt full threaded size: m12 x 55mm, pitch: 1.75mm, grade: 8.8 as per is: 1364(part-2) along with suitable one m12 nut, grade: 8.0 as per is: 1364(part-3), two f lat washers having id: 13mm, od: 32mm, thickness: 3mm and one spring washer as per is: 3063. qty/set. = 01 set. acceptable makes: tvs/unbrako/dfl/bmi/sundeep/ bimco. note: one sample set of each items should be got approved before effecting bulk supply. [ warranty period: 30 months after the date of deliv ery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]