Adapter 1/4" Female to 3/8" Female – Modern Studio Equipment.
Amazon.com: Niewalda 1/4 Inch Male to 3/8 Inch Female Tripod Screw Adapter 3 /8 to 1/4 Tripod Adapter Mount Screws, Accessories for Camera/Tripod/Monopod/Light Stand : Electronics
Midanya 1/4-Inch Female Pipe x 3/8-Inch Male Brass Pipe Fitting Reducer Adapter Air Hose Adapter Metal Pipe Adapter, 2 Pieces (1 Pair) - Amazon.com
Brass, 3/8 in x 1/4 in Fitting Pipe Size, Reducing Adapter - 46M454|706120-0604 - Grainger
Auray 5/8" Male to 3/8" & 1/4"-20 Female Combo AD-COMBO-S B&H
3 Piece Socket Adapter Set Increasing 3/8" 1/2" 3/4" Female 1/4" 3/8" 1/2" Male - Walmart.com
CRAFTSMAN 1/4-in to 3/8-in Standard Socket Adapter in the Socket Adapters department at Lowes.com
3814ADA, 3/8" Female to 1/4" Male Adapter - Triad Orbit
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
3/8 To 1/4 1/2 Inch Drive Ratchet Converter Socket Adapter Reducer Air Impact | eBay
Threading Adapter, NPT 3/8 Male to G 1/4 Female, Stainless Steel
Brass Adapter, 3/8 Female Compression x 1/4 In. Male Compression | True Value
Brass Adapter, Male (1/4-18 NPT), Female (3/8-18 NPT) – AGS Company Automotive Solutions
Special Adapter 3/8'' to 1/4'' thread - 088 | Manfrotto Global