1/2 NPT Female Solid Brass Three Piece Pipe Union Fitting Adapter – compressor-source

3/8 NPTF Female Union Tee Solid Brass Pipe Fitting T Joint Hose Conne – compressor-source

1/4 Male x 1/8 Female NPT Hex Bushing Adapter Pipe Reducer Brass Fitting 110C

3/8 NPTF Female Union Tee Solid Brass Pipe Fitting T Joint Hose Conne – compressor-source

3/8 NPTF Female Union Tee Solid Brass Pipe Fitting T Joint Hose Conne – compressor-source

3/8 NPTF Female Union Tee Solid Brass Pipe Fitting T Joint Hose Conne – compressor-source

GASHER 10PCS Brass Compression Tube Pipe Fitting Connector, 3/8 Tube OD x 3/8 Tube OD Connector : Industrial & Scientific

Solid Brass 1/4 NPT Quick Connector Air Hose Fittings Air Compressor Coupler Plug - AliExpress

1/4 NPT Extender Pipe Fitting 1-9/16 Long Solid Brass Pressure Gauge Adapter

1/4 NPT Female Nickel Plated Brass Pipe Union Adapter Fitting Solid C – compressor-source

1/2 x 1/2 Compression Male NPTF Adapter Solid Brass Compression Fitt – compressor-source

1/8 at Rs 15/piece in Bengaluru

Air Compressor Tank Port Fittings NPT 1/4 3/8 1/2'' Solid Brass Male Thread Water Drain Safety Valve Replacement Part - AliExpress