A must for any tool box or trailer! JEGS Plastic AN Caps & Plugs stop contaminants from entering 37° AN flare fittings and hose assemblies during storage, maintenance, or repair. Also good for masking when dipping, painting, or plating. Threaded to meet low pressure requirements without the use of O-rings, and knurled for easy installation with only light finger tightening. Kit includes four caps and four plugs each of -04AN, -06AN, -08AN, -10AN, -12AN, and -16AN sizes. Caps & Plugs -04AN through -12AN also available in packs of 6.