Whitecap Industries Replacement Cap and Chain-Deck Fill Replacement for Stainless Steel, 1.5-Inch Cap will fill a 316 Stainless Steel deck fill with 1.5" hose Works with part numbers: 6123, 6124, 6125, 6126 The treads on P/N 6061 are metric. Therefore, will not fit certain deck fills. A 316 S.S. deck Fill with 1.5 hose this cap will fit. Made in China.NOTE:cap should only be used on Whitecap Deck Fills