Salco Products (TE4S416SF03A) 4-Inch Flanged Stainless Steel Quick Connect Assembly, Black EPDM Gasket fits a 4-inch ball valve with four (4) 3/4-inch bolt holes on a 9-inch bolt circle. The quick connect flanged adapter is made out of 316 stainless steel. 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 416 stainless steel and features 5-1/4-inch-4 UN-2B threads along with a 1-inch NPT, 316 stainless steel, plug assembly as well as a 1-inch NPT nipple. The plug assembly includes a 1/4-inch, 18-8 stainless steel, chain with 15 links, approximate length of 19-inches. The thread on cap comes with a 3/8-inch by 3-1/2-inch, 18-8 stainless steel, S-hook, a 304 stainless steel lock ring that connects to a 3/8-inch, 18-8 stainless steel, chain with a 3/8-inch -16 by 2-1/4-inch, 18-8 stainless steel hex bolt, a 3/8-inch, 18-8 stainless steel lock nut and two (2), 18-8 stainless 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 EPDM gasket for the cap. AAR Approval # E-149523. Approved for DOT Stenciled Cars.