Salco Products (TE4IUTF1A) 4-Inch Flanged Ductile Iron Quick Connect Assembly, Black Nitrile Gaskets fits a 4-inch ball valve with four (4) 3/4-inch bolt holes on a 7-3/4-inch bolt circle. The quick connect flanged adapter is made out of ductile iron. It features a 4-inch cam groove and 5-1/4-inch -4 Special -2A threads. The 4-inch, quick connect, thread on cap is made out of ductile iron and features 5-1/4-inch -4 UN -2B threads along with a 1-inch NPT, carbon steel, plug assembly. The plug assembly Includes a 1/4-inch, carbon steel, chain of 15 links with an approximate length of 19-inches. The thread on cap comes with a 3/8-inch by 3-1/2-inch, zinc plated carbon steel, S-hook, a 304 stainless steel lock ring that connects to a 3/8-inch, carbon steel, chain with a 3/8-inch by 2-1/4-inch, zinc plated carbon steel, hex bolt, a 3/8-inch, zinc plated carbon steel, lock nut and two (2), 3/8-inch USS, zinc plated carbon steel, flat washers. Length of chain is 15 links which is approximately 21-inches long. The quick connect assembly is about 8-inches high and comes with a Black Nitrile gaskets for the cap and flange. AAR Approval # E-149523. Approved for DOT Stenciled Cars.