supply of set of higher capacity air spring assembly ( 160 kn ) along with hardware items for lhb coaches having fiat bogies. 1 ) higher capacity air spring assembly ( 160 kn ) for lhb coaches having fiat bogies confirming to rdso specification no. rdso / cg / s / 23002, rev. nil ( april, 2023 ) .sub item no. 4, qty.-01no / set. ( leading parameters of 160kn air spring for lhb bogie which are at page no.43 of 53 of rdso specification no. rdso / cg / s / 23002, rev. nil ( april, 2023 ) . sub item no. 4, shall be strictly followed ) . 2 ) high tensile hexagonal socket-head cap screw, m20x55 long, is:2269 ( latest ) class 10.9, qty.-4nos / set.3 ) prevailing torque type hexagonal nut ( with non-metallic insert ) , m20:b, is:7002 ( latest ) class 10, qty.-4 nos / set.4 ) hardened and tempered washer with 300 hv class ( 300 hv 370 hv ) hardness, a22, is:2016 ( latest ) , qty.-4 nos / set. note: all fasteners ( screws, nuts & washers ) shall be zinc electroplated to a3l finish of is:1367 ( part-11 ) and confirming to rdso spec. no rdso / cg / s / 23002, rev. nil ( april, 2023 ) . sub item no. 4, [ warranty period: 72 months after the date of delivery ]