Festo - AD-G1/8-1/8NPT-I - Thread Adapter, 1/8 ISO G male to 1/8 NPT female, zinc pl steel - RS
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