Stainless Steel 304 Hex Nipple, Threaded Pipe Fitting, 1" x 1" Male NPT Pipe Straight Adapter Connector (1'' NPT x 1'' NPT, 2) - Amazon.com
4PCS Hex Nipple 1" Male x 1" Male Pipe Fittings, 304 Stainless Steel 1 inch NPT Male Threaded Pipe Adapter Fittings Equal Nipples Connectors, Male Straight Connector Pipe Fitting - Amazon.com
Made in USA - Compression Tube Connector: 1/2-20 & 1/8″ Thread, 1/4″ Tube OD, Compression x Threaded - 32877342 - MSC Industrial Supply
1" Threaded End Connector with Stud | DragonPlate
0.625" Threaded End Connector | DragonPlate
TruDesign T-Piece Threaded Connector - Hooker Electric Reels
PC Pneumatic Fitting Straight Male NPT Threaded Quick Connect Air Tube Connector Copper Brass Push Fit in Pneumatic Pipes Tube Fitting - China Push in Fitting, Pipe Fitting | Made-in-China.com
0.5" OD Threaded Pultruded Tube Connector (Male) | DragonPlate
10 Pack Threaded Spring Tube Connectors, 19mm - 32mm, Spring Tube Insert, Steel | eBay
Amazon.com: Pipe Fittings Stainless Steel Threaded Connector, Male Thread Connector, for Gas Hardware Compressed Air Building Materials Plumbing : Everything Else