Manfrotto 015 Female 3/8" to Male 1/4"-20 Adapter 015 B&H Photo
3/8 1/2 3/4 Drive Socket Reducer Air Impact Heavy Duty Ratchet Adapters New | eBay
JIC 8 Male x 3/8" NPT Male Straight 2404-08-06 Adapter | JIC Male to NPT Male - Straight | JIC to NPT | Hydraulic Adapters & Fittings | Hydraulics | www.surpluscenter.com
LTWFITTING 3/8 in. O.D. Comp x 3/4 in. FIP Brass Compression Adapter Fitting (5-Pack) HF6661205 - The Home Depot
Amazon.com: KOOTANS 4pcs Forged Brass Reducing Hex Nipple, 3/8" NPT Male x 1/4" NPT Male Pipe Adapter Brass Pipe Fitting Couplings : Industrial & Scientific
Amazon.com: KOOTANS Forged Brass Equal Hex Nipple, 3/8'' NPT Male x 3/8'' NPT Male Thread Adapter Brass Pipe Fittings Connector Couplings (Pack of 4) : Industrial & Scientific