FP - MJ Bulkhead Straight. 2.09" Long. 0.750" Hex. 7/16" - 20 Thread. 1/4" - 18 Thread.
eBay
5-10Packs Plastic Hose Barb Fitting, 10mm x 10mm,12mmx12mm,13mmx13mm,11mmx16mm Barbed Splicer Mender Joint Adapter Union Fitting
Aliexpress UK
JIC UNION BULKHEAD 2700-12-12 NEW HYDRAULIC ADAPTER
eBay
304 Stainless Steel Pipe Coupling Fitting, 1/2" x 1/2" Female Pipe Coupler Connector Adapter Fitting (1" Length)
Aliexpress UK
1/2" (#8) MALE JIC 37 DEGREE. MALE JIC THREAD: 3/4-16. BULKHEAD ADAPTER.
eBay
Pneumatic Air Connector Fitting PC/PCF/PL/PLF 4mm 6mm 8mm Thread 1/8" 1/4 3/8 1/2 Straight Hose Fittings Pipe Quick Connectors
Aliexpress UK
MJ - MJ Bulkhead 45. Nut Sold Separate. 1.67" Long. 0.562" Flat. 9/16" - 18 Thread.
eBay
3pcs 1/4" Male to 1/4" Male NPT Nipple Fitting, Pipe Fitting Adapter for Connection of Airless Paint Sprayer Hose and Others
Aliexpress UK
MP - MJ Bulkhead Straight.87 x 2.42. 9/16" - 18 Thread. 1/2" - 14 Thread.
eBay
High Quality Black Pneumatic Fitting Pipe Connector Tube Air Quick Fittings 3/4/6/8/10/12/14/16mm PU PY PK PE PV SA HVFF PZA PM
Aliexpress UK
MJ--MJ Bulkhead. 1-5/16" - 12 Thread. 3.14" Long.
eBay
Pneumatic Air Connector Fitting PC/PCF/PB/PKB/PH/PL/PLF/PX/SL 4mm 6mm 8/10mm Thread 1/8 1/4 3/8 1/2 Black Plastic Hose Fittings
Aliexpress UK
3/4"-16 MALE JIC, both ends. Full thread with jam nut for bulkhead mounting.
eBay
10/50PCS Pneumatic Fitting Air Connector PC 4mm 6mm 8mm 10mm 12mm Thread 1/8" 1/4" 3/8" 1/2" Hose Fittings Pipe Quick Connectors
Aliexpress UK
MJ - MJ Bulkhead 90. 3/4" - 16 Thread. 2.11" Long. 0.750" Flat.
eBay
1/4 "1/2" 3/4 "1"1-1/2" 2 "BSP 304 Stainless steel pipe fittings Four-way/three-way type/elbow butt adapter pipe fittings
Aliexpress UK