Salco Products (TMC20841) 20-Inch 8 Bolt Carbon Steel/Stainless Steel Manway Cover with Two Pipe Nipples and a Mirror Finish features a 1/2-inch thick, 316L stainless steel, manway dome and carbon steel manway ring welded together. The manway has eight (8) 1-1/8-inch eye bolt slots on a 24-3/8-inch bolt circle with an AAR #1 style gasket groove. Also includes two (2) carbons steel manway hinges, and carbon steel manway safety stops. The Nitronic 60, 3/4-inch NPT, pipe nipple is 3-inches tall and includes a 3/4-inch, 304 stainless steel, bee screen. Also includes a 3/4-inch NPT, 316L stainless steel, pipe cap assembly with a stainless steel chain assembly that consists of a 1/4-inch, 304 stainless steel, swivel link which is crimped around the plug, and is connected to a 1/4-inch, 18-8 stainless steel, chain of 4 links. The 2-inch NPT, 316L stainless steel, center pipe nipple is 2-7/8-inches tall. Length from the center of the manway cover to the center of the hinge bolt holes is 14-inches. Fits Union Tank Car OEM nozzle arrangement. AAR Approval # E-182113.