Comprehensive Stereo 1/4" Male to Stereo 1/8" (3.5mm) SPP-MJS
Amazon.com: Cable Matters 5-Pack 1/4 to 1/8 Headphone Adapter, 6.35mm to 3.5mm Adapter Male to Female, Gold Plated Stereo Headphone 3.5mm to 1/4 Adapter : Everything Else
NANYI 1/4'' Male to 1/8'' Female Stereo Headphone Adapter Connect Cable, Upgrade 6.35mm Jack Stereo Socket Male to 3.5mm Jack Stereo Plug Female for Headphone, Amp Adapte, Black 1-Pack - Walmart.com
LTWFITTING 1/8 in. OD Comp x 1/8 in. FIP Brass Compression Adapter Fitting (5-Pack) HF662205 - The Home Depot
Amazon.com: GlowShift 1/8 BSPT Male to 1/8-27 NPT Female Gauge Sensor Sender Thread Adapter Reducer : Automotive
Everbilt 1/8 in. Barb x 1/4 in. MIP Brass Adapter Fitting 800049 - The Home Depot
Brass Adapter, Male (1/8-27 NPT), Female (1/4-18 NPT) – AGS Company Automotive Solutions
Amazon.com: NANYI 1/4 Inch Female to 1/8 Inch Male Stereo Headphone Adapter, Upgrade 6.35mm Jack Stereo Socket Female to 3.5mm Jack Stereo Plug Male for Headphone, Amp Adapte, Black 1-Pack : Electronics
Value Collection - Grease Fitting Adapter: 1/4-28 Male NPT, 1/8″ Female NPT - 61833844 - MSC Industrial Supply
Amazon.com: VCE 1/4" to 1/8" Adapter, 3.5mm 1/8 inch Male to 6.35mm 1/4 inch Female Audio Jack Gold Plated Adapter for Amplifiers, Guitar, Home Theater Devices, Laptop, Headphones - 8 inch : Electronics