PARKER Reducing Adapter: 316 Stainless Steel, 3/8 in x 1/4 in Fitting Pipe Size, Female NPT x Male NPT - 1DFY1|6-4 RA-SS - Grainger
![BrassCraft 1/4-in x 3/8-in Compression x Mip Adapter Fitting in the Brass Fittings department at Lowes.com BrassCraft 1/4-in x 3/8-in Compression x Mip Adapter Fitting in the Brass Fittings department at Lowes.com](http://mobileimages.lowes.com/productimages/918e058b-ee89-4dc7-8ebf-a3979151ba01/04463389.jpg)
BrassCraft 1/4-in x 3/8-in Compression x Mip Adapter Fitting in the Brass Fittings department at Lowes.com
![Amazon.co.jp: 1/8 '1/4' 3/8 '1/2' 3/4 '1' Brass Pipe Hex Nipple Fitting Quick Coupler Adapter Thread - Thread Water Oil Gas Connector, 1l4 x 1l2 : Industrial & Scientific Amazon.co.jp: 1/8 '1/4' 3/8 '1/2' 3/4 '1' Brass Pipe Hex Nipple Fitting Quick Coupler Adapter Thread - Thread Water Oil Gas Connector, 1l4 x 1l2 : Industrial & Scientific](https://m.media-amazon.com/images/I/31Zq3PxTYhL._AC_SX425_.jpg)
Amazon.co.jp: 1/8 '1/4' 3/8 '1/2' 3/4 '1' Brass Pipe Hex Nipple Fitting Quick Coupler Adapter Thread - Thread Water Oil Gas Connector, 1l4 x 1l2 : Industrial & Scientific
![Value Collection - 3/8 Female & 1/4 Male NPTF Steel Hydraulic Hose Adapter - 59755272 - MSC Industrial Supply Value Collection - 3/8 Female & 1/4 Male NPTF Steel Hydraulic Hose Adapter - 59755272 - MSC Industrial Supply](https://cdn.mscdirect.com/global/images/ProductImages/5975527-24.jpg)
Value Collection - 3/8 Female & 1/4 Male NPTF Steel Hydraulic Hose Adapter - 59755272 - MSC Industrial Supply
![楽天市場】ソケットサイズ変換アダプター4個組セット/1/4 → 3/8 ・ 3/8 → 1/43/8 → 1/2 ・ 1/2 → 3/8各サイズのハンドルとソケットレンチ互換性拡張/差込角のサイズを変換/【送料無料】代引き不可/ : 工具ダイレクト 楽天市場店 楽天市場】ソケットサイズ変換アダプター4個組セット/1/4 → 3/8 ・ 3/8 → 1/43/8 → 1/2 ・ 1/2 → 3/8各サイズのハンドルとソケットレンチ互換性拡張/差込角のサイズを変換/【送料無料】代引き不可/ : 工具ダイレクト 楽天市場店](https://tshop.r10s.jp/kougudirect/cabinet/02576139/02696967/imgrc0089844582.jpg?fitin=720%3A720)