Steel bars, alloy, hot-wrought orcold finished, quenched and tempered alloy; alt matl: alloy steel and stainless steel bolting matls for hightemp service; fin. No. 5.1.1. Dull, plus fin. No. 20.24 of mil-std-171; green; mask holes prior to painting; o/a lg 25.93 in.; o/a w 16.00 in.; o/a h 1.78 in.