![3/8 3/8](https://m.media-amazon.com/images/I/51ckGjDcG9L.jpg)
3/8" NPT Female to 1/4" NPT Male Brass Pipe Adaptor/Adapter Straight Reducer/Reducing Coupling Male to Female: Pipe Fittings: Amazon.com: Industrial & Scientific
![Apex - 3/8 Socket Drive to 1/4 Hex Female Quick-Release Square-Drive to Hex Bit Adapter - 06699342 - MSC Industrial Supply Apex - 3/8 Socket Drive to 1/4 Hex Female Quick-Release Square-Drive to Hex Bit Adapter - 06699342 - MSC Industrial Supply](https://cdn.mscdirect.com/global/images/ProductImages/0669934-23.jpg)
Apex - 3/8 Socket Drive to 1/4 Hex Female Quick-Release Square-Drive to Hex Bit Adapter - 06699342 - MSC Industrial Supply
![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
![Amazon.com : Manfrotto 088LBP Adapter 1/4-Inch- 20 to 3/8-Inch with flange : Tripod Accessories : Electronics Amazon.com : Manfrotto 088LBP Adapter 1/4-Inch- 20 to 3/8-Inch with flange : Tripod Accessories : Electronics](https://m.media-amazon.com/images/I/71k4D+PKB8L.jpg)
Amazon.com : Manfrotto 088LBP Adapter 1/4-Inch- 20 to 3/8-Inch with flange : Tripod Accessories : Electronics
![Ideal Vacuum | Adapter 3/8 inch hose barb to 1/4 inch ID Male NPT, Stainless Steel, Vacuum Fittings Adapter, Swagelok, SS-6-HC-1-4 Ideal Vacuum | Adapter 3/8 inch hose barb to 1/4 inch ID Male NPT, Stainless Steel, Vacuum Fittings Adapter, Swagelok, SS-6-HC-1-4](https://www.idealvac.com/files/images/1_4MNPT_to_3_8_Barb.jpg)
Ideal Vacuum | Adapter 3/8 inch hose barb to 1/4 inch ID Male NPT, Stainless Steel, Vacuum Fittings Adapter, Swagelok, SS-6-HC-1-4
GRAINGER APPROVED Reducing Adapter: Brass, 3/8 in x 1/4 in Fitting Pipe Size, Female NPT x Male NPT, Reducer - 46M454|706120-0604 - Grainger
![Amazon.com : Standard 3/8 Amazon.com : Standard 3/8](https://m.media-amazon.com/images/I/51RF5E1GcmL._AC_SY580_.jpg)