Thorlabs - AS25E6M Adapter with Internal 1/4"-20 Threads and External M6 x 1.0 Threaded Stud
Hitch Adapter - 2" Adapter for 1-1/4" Hitches
Wera - Socket Adapter: Square-Drive to Hex Bit, 1/4" Hex Male, 1/4" Square Female - 67765537 - MSC Industrial Supply
Beyerdynamic 981209 1/4 inch TRS Male to Threaded 3.5mm TRS Female Headphone Adapter | Sweetwater
DEWALT 1/4-in to 1/2-in Socket Adapter in the Socket Adapters department at Lowes.com
1/4" Male NPT x 1/4" Flare (SAE) Brass Adapter
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
Prestacycle Professional Low-Profile 1/4" Hex to 1/4" square Socket Adapter - Prestacycle
Hosa Technology 3.5mm TRS to 1/4" TRS Headphone Adapter GHP-105
R1234YF Adapter 1/2" ACME Left Hand Female to 1/4" SAE Male #3110 | Enviro-Safe Refrigerants, Inc.
Shure Threaded 1/4 Inch Adapter | Guitar Center
Shure HPAQA1 1/4 inch TRS Male to Threaded 3.5mm TRS Female Stereo Headphone Adapter | Sweetwater
QVS Standard Audio Adapter Black (CC399PS-FM) - Micro Center
Audio Adapter, 3.5 mm headphone jack to 1/4" plug | Crest Healthcare