1set Male To Female Screw Adapter 1/4" 3/8" Mount Set Thread Screw Adapters Convert For Camera Tripod Light Stand - Tripod Monopods - AliExpress
Good Screw Dual Action Adapter for Rotary Backing Plates | Chemical Guys
Amazon.com: CAMVATE 1/4" Female to 3/8" Male & 3/8"-16 Female to 1/4"-20 Male Screw Adapter for Tripod and Camera and Qr Plate/Adapter Brass - 0910 : Electronics
1/4 to 1/4 Screw Adapter - For Camera / Tripod / Photo / Video : ID 2632 : $1.50 : Adafruit Industries, Unique & fun DIY electronics and kits