446-074 - 446-074 - 1/2" x 3/4" PVC Sch. 40 Male x Female Adapter
Threading Adapter, NPT 1/2 Male to G 1/4 Female
Amazon.com: UGREEN 6.35mm 1/4 Male to 3.5mm 1/8 Female Stereo Headphone Adapter Audio Jack Plug Gold Plated for Speaker Headphone Guitar Digital Piano Amp, 2 Pack : Electronics
Barrel EXTENSION, Threaded Barrel Adapter 1/2-28 to 1/2-28 TPI