Replacement parts for compressed air components High pressure, 3/8 inch MPT twist lock fitting for 3M™ Compressed Air Filter and Regulator Panel W-2806 Low pressure, 3/8 inch FPT twist lock steel and brass fitting for 3M™ Supplied Air Hose W-3020 3M Catalog# W-3182-2 , 3M Catalog# W-3198-2