3 Piece Socket Adapter Set Increasing 3/8" 1/2" 3/4" Female 1/4" 3/8" 1/2" Male - Walmart.com
Parker - Industrial Pipe Adapter: 1/2″ Female Thread, 3/4-16 Male Thread, Male Straight Thread O-Ring x Female NPTF - 09107921 - MSC Industrial Supply
CRAFTSMAN 1/2-in to 3/4-in Standard Socket Adapter in the Socket Adapters department at Lowes.com
Crouse-Hinds REA12 1/2" x 3/4" Steel Male to Female Threaded Conduit Adapter | Cooper Electric
Aluminum Adapter, 3/4" Male NPT to 1/2" Male NPT | Air & Hydraulic Equipment,Inc.
3/4" x 1/2" Schedule 40 PVC Female Adaptor Socket x FPT, 435-101
Amazon.com: Joywayus 1/2" NPT Thread Female × 3/4" G Thread Male Brass Pipe Fitting Adapter : Industrial & Scientific
Everbilt 3/4 in. MHT x 1/2 in. MIP Brass Adapter Fitting 801799 - The Home Depot
Horiznext npt 1/2-3/4 male to female thread reducer adapter, stainless steel connector for plumbing,shower hose, sink faucet, tub, air water gas line(2 pcs) - Amazon.com
30336 - Elkhart 30336 - 3/4" x 1" Copper x Male Adapter
1/2-28 To 3/4-16 Automotive Threaded Adapter Stainless Steel 1/2x28 To 3/4x16 | eBay
Orbit 1/2 in. x 3/4 in. MNPT Poly Adapter 37217 - The Home Depot