LTWFITTING 5/16 in. O.D. Comp x 3/8 in. MIP Brass Compression Adapter Fitting (5-Pack)-HF685605 - The Home Depot
Thread adapter, 5/16-24 Female thread, 3/8-24 Male thread. | eBay
BATO Adapter 3/8";. For 5/16"; bit.
Custom Brass Union Fitting Adapter 1/4" 5/16" 3/8" 1/2" Male Thread Equal Tee - Buy Equal Male Tee Brass Pipe Fitting Tee Connector,3ways Fitting Tee Male Tee Adapter Connection,Male Thread For Hose
CARBURETOR FUEL LINE ADAPTER 3/8" x 5/16" = 5/8 18 MALE x 1/2 20 FEMALE | eBay
3/8" NPT Male To 5/16" Inverted Flare Female Adapter Fitting - BF56 - Affordable Street Rods
Hillman 5-Pack 5/16-in x 3/8-in Threaded Coupling Adapter Fitting in the Brass Fittings department at Lowes.com
Puller Adapter 5/8-18 Female To 3/4-16 Male
OTC 8005 Male 3/8"-16 Female 5/8"-18 Threaded Adapter 8B-7557
Buy ERGAOBOY 4 Pcs BPV31 Bullet Piercing Valve with 7/16 R22 to R134A Low Side Adapter,Fit for AC 1/4,5/16,3/8 Pipes Online in Saint Helena, Ascension and Tristan da Cunha. B09B3PCSFL