Description HOLDS THE LOCKING DUST CAP / bevel seat end caps. 1.5 inch Nut has an Outside Diameter of 2.4 inches ACME Threads Stainless Steel Hexnut for 1.5 inch TANK VALVES AND BEVEL SEAT END CAPS. FITS 1000-571 and 1000-581 end caps Fits all Milk Tank Valves with a 1.5 inch threaded bevel seat outlet. 4999-1000-391 CC13H-15 81580006 13H1.5 Related Items; M-3897 - 1.5 Inch Gray Plastic Nut (same as this item but in gray plastic) 1000-391 - 1.5 Inch Stainless Steel Nut (this item) 1000-571 - 1.5 Inch Stainless Steel End Cap 1000-581 - 1.5 Inch White Plastic End Cap 1000-391 BUNA rubber gasket for 1.5 inch bevel seat 1000-384 Male Bevel Seat Weld Ferrule 1000-621L Female Bevel Seat Weld Ferrule in stock - updated March 2026