Compression sleeves for plastic tube - 3/8 - Master Plumber®

Compression Fittings - TFC Industrial Controls

Often used between fittings and tubes, each 3/8 in. Compression Brass Sleeve is naturally corrosion resistant. Can be used with copper, brass,

Everbilt 3/8 in. Nylon Compression Sleeve Fittings (3-Pack) 800649 - The Home Depot

Compression Fittings Giant Wholesale Distributors Ltd.

Master Plumber Cone Washers, Assorted 8-Pk.

Master Plumber Slip Joint Nuts, Washers & Rings For 7/16 or 1/2-In. OD Rubber Slip Joint Connectors

Compression nuts - 1/4 - Master Plumber®

Tube to Female Pipe - Bulkhead - Air Brake D.O.T. Compression Fittings for J844 Tubing - NTA

Plastic Compression Sleeve 3/8

Plumbing - Pipes & Fittings - Helena, AL - Helena Hardware

PL Elbow Pneumatic Air Fittings Pipe 4mm 6mm 8mm 10mm 12mm OD Hose Tube Push In Thread Hose Quick Connector 1/8 1/4 3/8 1/2 - AliExpress

Can you use compression fittings on plastic tubing? - Quora