MJ--MJ Bulkhead. 2.18" Long.812" Flats. 9/16" - 18 Thread.
eBay
Full Copper Female Thread Conversion Male Thread Copper Fitting 1/8' 1/2' 1/4' 3/4' 3/8 1 Inch Brass Fitting Water Gas Adapter
Aliexpress UK
FJ - MJ Bulkhead Straight. 1/2" - 14 Thread. 7/8" - 14 Thread.
eBay
Pneumatic Air Connector Fitting PC/PCF/SL/PB/PX/PL 10mm 12mm 14mm 16 Thread M5 3/4" 1 2 way Hose Fittings Pipe Quick Connectors
Aliexpress UK
Steel 08MJ BULKHEAD UNION BRANCH TEE.
eBay
1Pc Euro Air Line Hose Connector Fitting Female Quick Release 1/4" 3/8" 1/2" Inch BSP Female Pneumatic Fittings EU type
Aliexpress UK
MJ - MJ - MJ Bulkhead. 1-5/8" - 12 Thread. 1.312" Flat.
eBay
Pneumatic Fittings Brass 4 6 8 10 12 14 16mm OD Tube Compression Ferrule Tubing Compression Fitting Connector PU PV PE PZA PM
Aliexpress UK
Bulkhead Locknut. 1/2" - 20 Thread.
eBay
Pneumatic Plumbing Brass Pipe Fitting Male/Female Thread 1/8" 1/4" 3/8" 1/2" 3/4" 1"BSP Copper Fittings Water Oil Gas Adapter
Aliexpress UK
MJ - MJ Bulkhead 45. Nut Sold Separate. 1.94" Long. 0.750" Flat. 3/4" - 16 Thread.
eBay
4mm/6mm/8mm/10mm/12mm Pneumatic Plug Fittings Quick Nylon Blanking Fitting Hose Tube Push Fit Dustproof Seal Connector Air Line
Aliexpress UK
FP- MJ Bulkhead Straight. 1-5/16" - 12 Thread.
eBay
For Swivel PTFE Oil Fuel Line Hose End Fitting AN4/6/8/10/12 Straight 0°/45°/90°/180° Reusable Hose End Fitting Adapter
Aliexpress UK
Triple-Lok JIC Bulkhead Hydraulic Fitting.
eBay
10PCS Pneumatic Air Connector Fitting PC 4mm 6mm 8mm 10mm 12mm Thread 1/4" 1/8" 3/8 1/2 Hose Fittings Pipe Quick Connectors
Aliexpress UK