Port Adapter - 1/4 x 3/8 Female Flare x Flare Adapter w/ Copper Gasket Brass - 105 - UR3-46 | HVACDirect.com
Husky 3/8 in. Female to 1/4 in. Male Drive Adapter HADPTR3814 - The Home Depot
Adapter, 1/4-in. Female to 3/8-in. Male Part# 1-11394 - AccuStream
Adapter, Male 3/8″-24 UNF – 1/4″ MNPT
Threading Adapter, NPT 3/8 Male to G 1/4 Female, Stainless Steel
LDR Industries 3/8 in. x 1/4 in. M.I.P. Brass Male Adapter at Tractor Supply Co.
Threading Adapter, NPT 1/4 Female to NPT 3/8 Male
Manfrotto 015 Female 3/8" to Male 1/4"-20 Adapter 015 B&H Photo
1/4-28 to 3/8-24 Adapter - Agate Technology
Everbilt 1/4 in. OD Compression x 3/8 in. Flare Brass Adapter Fitting 800779 - The Home Depot
3/8" Female SAE Swivel X 1/4" Male NTPF Adapter | Calóre Equipment
U.S. Solid 2pcs Brass Pipe Fitting Adapter, Male Pipe x Female Pipe, 1/2" x 1/2", 1/2" x 3/4", 1/4"x 1/4", 1/4" x 3/8", 1/8" x 1/4", 1/8" x 1/8", 3/8" x 3/8" -
DEWALT Impact Ready 3/8-in to 1/4-in Standard Socket Adapter in the Socket Adapters department at Lowes.com
Parker Expander Adapter 3/8 in NPT x 1/4 in NPT Brass FG-B-3/8X1/4
1/4" to 3/8" Thread Adapter
Impact Female 1/4"-20 to Male 3/8"-16 Thread Adapter CA-109 B&H
Kobalt 1/4-in x 3/8-in Adapter in the Air Compressor Fittings department at Lowes.com