Air spring mounting plate MHT1015 for Hendrickson-Turner HT300U-7.5-001,501,519, U-9-001,005,001,021,022,024,501,519,701, U-12-001,005,011,020, UB-9-022. 12 inch diameter. .813 inch center hole diameter, .625 inch mounting hole diameter. Replaces Hendrickson part number A24966. Fits roadside and curbside applications.