1-1/8" to 1" Headtube Headset Reducer / Adapter 1.125" to 1"
6.35mm (1/4 inch) Male to 3.5mm (1/8 inch) Female Stereo Audio Adapter Converter for Guitar Headphones Amp , Gold Plated 2 Pack - Walmart.com
Amazon.com: CESS 2-Pack 1/4" Stereo Phone Screw-On Adapter - Male 1/8" to Male 1/4" - 3.5mm Stereo to 6.35mm Stereo : Electronics
Hosa Cable CMR210 Stereo 1/8 Inch to Dual RCA Adapter Cable - 10 Foot - Walmart.com
Threading Adapter, G 1/4 Male to NPT 1/8 Female
Pressure Gauge Adapter, 1/8 BSP Male & Female, 1/8 NPT F Tee - Pegasus Auto Racing Supplies
Pressure Gauge Adapter, M16 Male & Female, 1/8 NPT F Tee - Pegasus Auto Racing Supplies
Amazon.com: Cable Matters 5-Pack 1/4 to 1/8 Headphone Adapter (3.5mm to 1/4 Adapter, 6.35mm to 3.5mm Adapter) : Everything Else
AutoMeter 1/16in NPT Male To 1/8in Female Fuel Rail Gauge Adapter
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