10-32 RH x 3/8 in. .037 in. Tube Adapter, Aluminum, Carbon Fiber Tube | Quarter-Max
Tube Adapters from Pro-Werks
1/4" ISO to 1/8" Tubing Adapter - Next Advance - Laboratory Instruments
Tube Adapters | Kitty Kollar
US Machinegun: *Buffer Tube Adapter for MPA 9mm (Newer Models), MASTERPIECE ARMS / VULCAN / VELOCITY ALL 9MM, MINI SERIES & 5.7x28mm SERIES - UPGRADES, ADPT-MPA9M
Amazon.com: Metalwork 304 Stainless Steel Compression Tube Fitting Male Connector Adapter 3/8" NPT Male x 10mm OD (2 Pcs) : Industrial & Scientific
LENZ 100-16-16 TUBE PIPE ADAPTER | Air & Hydraulic Equipment,Inc.
Picatinny Buffer Tube Adaptor - Midwest Industries, Inc.