JOMLEY 5/8"-27 Female to 3/8"-16 Male and 3/8"-16 Female to 5/8"-27 Male Screw Thread Adapter for Microphone Stand Mount to Camera Tripod Adapter- 2 Pack : Amazon.co.uk: Electronics & Photo
Adapter 5/16" push-in tubing to 3/8" thread for pure water fed pole
Kupo KS-053 Adapter for thread 3/8''-16 to 1/4''-20 set of 5
Manfrotto 191 Adapter 5/8"- 3/8" – Thomann UK
Hillman 5-Pack 5/16-in x 3/8-in Threaded Coupling Adapter Fitting in the Brass Fittings department at Lowes.com
3/8"-16,5/16"-18 x W1/2" x L1 1/8" Coarse Thread Hex Rod Coupling Nut ( Reducer) Stainless Steel 18-8 | ASMC.net
Manfrotto 186 Adapter 5/8"- 3/8" – Thomann UK
Tap Adaptor - UNS Thread, 5/16"tu x 7/16"-24
Auray 5/8" Male to 3/8" & 1/4"-20 Female Combo AD-COMBO-S B&H
3/8" NPT Male To 5/16" Inverted Flare Female Adapter Fitting - BF56 - Affordable Street Rods
Stainless Reducer Bushing | Really Right Stuff
Buy - Kupo Baby Pin With 3/8"-16 Male Threaded Bolt - Production Gear Ltd - Broadcast and Professional Cameras & Accessories
Thread Adapter - B2375-1 3/8"-24 FEMALE x 5/16"-24 MALE