Axle End Steel High Tensile Cap Screws-1 1/8 Inch Dia, 7 Unc-2A, 2 1/2 Inch Thread Length Fo R Aar Approved Ctrb Class-K Of Boxns Wagons. Specification No Ab/Rb-41-2016 & Is 1367 Pt.3, Ci P8.8, Drg. No. Wd-18016-S-01 (Alt.1, Item No. 2). [ Warranty Period: 36 Months After The Date Of Delivery ] ]