Manfrotto 015 Female 3/8" to Male 1/4"-20 Adapter 015 B&H Photo
3/8 Female x 1/4 Male Brass Adapter - Fastener Warehouse
1/4" NPT Male x 3/8" NPT Female Swivel Straight 1404-04-06 Adapter | NPT Female Swivel to NPT Male - Straight | NPT to NPT | Hydraulic Adapters & Fittings | Hydraulics | www.surpluscenter.com
Brass Adapter, 3/8 Female Compression x 1/4-In. Male Compression - Slanesville, WV - Slanesville General Store
LASCO 17-6759 1/4-Inch Female Compression by 3/8-Inch Male Compression Brass Adapter, Copper - Pipe Fittings - Amazon.com
BU03-02 (Brass, 3/8" Male x 1/4" Female NPT) - Advanced Technology Products
Husky 3/8 in. Female to 1/4 in. Male Drive Adapter HADPTR3814 - The Home Depot
1/4" Male NPT x 3/8" Female NPT Brass Straight Adapter | Fastenal
Amazon.com : Camera Screw Adapter Thread 1/4" Male to 3/8" Female and 3/8" Male to 1/4" Female Adapter Set for Camera Monitor, Tripod, Mount : Electronics
Kobalt 1/4-in x 3/8-in Adapter in the Air Compressor Fittings department at Lowes.com