Manfrotto 119 Short (16mm) Adapter Spigot with 1/4"-20 & 3/8"
Buy Now the Ring Lock System Scaffold Spigot Adapter Clamp – ScaffoldExpress.com
Impact Double Flat-Edge Spigot Adapter CA-119 B&H Photo Video
1/4inch 3/8 Inch Metal Thread Spigot Stud Male Adapter Camera Screw For Umbrella Flash Light Tripod Photography Setup - Photo Studio Kits - AliExpress
Spigot Adapter 1 Spigot x 1 Insert - AquaCave.com
Spigot Adapter 2" Schedule 40 Hub to 4" S&D 533 - The Drainage Source
Amazon.com : Neewer 2 Pieces Standard 1/4 to 3/8 inch Metal Male Convertor Threaded Screw Adapter Spigot Stud for Studio Light Stand, Hotshoe/Coldshoe Adapter, Ball Head, Wireless Flash Receiver, Trigger : Electronics
Danco Dual Standard Adapter in the Faucet Aerators department at Lowes.com
2 1/2" PVC IPS Gasket Joint Spigot Adapter (G x Spigot) - The Drainage Source
A.C. Lighting Inc. - Entertainment Lighting Technologies | Double End Stud (1/4''-20 & 3/8'') Adapter Spigot