Everbilt 1/4 in. OD Compression x 3/8 in. Flare Brass Adapter Fitting 800779 - The Home Depot
Brass Adapter, Male (1/4-18 NPT), Female (3/8-18 NPT) – AGS Company Automotive Solutions
3/8-24 to 1/4-20 Stainless Steel Adapter GigaParts.com
Manfrotto 015 Female 3/8" to Male 1/4"-20 Adapter 015 B&H Photo
Parker Expander Adapter 3/8 in NPT x 1/4 in NPT Brass FG-B-3/8X1/4
Amazon.com : Camera Screw Adapter Thread 1/4" Male to 3/8" Female and 3/8" Male to 1/4" Female Adapter Set for Camera Monitor, Tripod, Mount : Electronics
3 Piece Socket Adapter Set Increasing 3/8" 1/2" 3/4" Female 1/4" 3/8" 1/2" Male - Walmart.com
1/4" to 3/8" Thread Adapter
Threading Adapter, NPT 1/4 Female to NPT 3/8 Male
Husky 1/4 and 3/8 in. Drive Adapter Set (3-Piece) HADPTR3PC - The Home Depot
Adapter 1/4" Female to 3/8" Female – Modern Studio Equipment.
Threading Adapter, NPT 3/8 Male to G 1/4 Female, Stainless Steel
U.S. Solid Brass Hose Fitting, Adapter, 1/4" Barb x 1/8" NPT Male Pipe Fitting, 1/4"x 1/4", 3/8" x 1/4", 3/8"x 3/8",1/2"x 1/2", 3/4"x 3/4" - U.S. Solid
Amazon.com: KOOTANS 4pcs Forged Brass Reducing Hex Nipple, 3/8" NPT Male x 1 /4" NPT Male Pipe Adapter Brass Pipe Fitting Couplings : Industrial & Scientific