threaded CD Series Threaded Plastic Caps for Flared JIC Fittings CD Series threaded caps for flared JIC fittings protect against dirt, moisture and other contaminants. The cap can also be used as a mask during dipping, painting and plating. * Knurled for ease of application Material: Low-Density Polyethylene Color: Red Applicable Specs: NAS 832 A THD CD-M Series Threaded Plastic Caps for Metric Fittings CD-M Series threaded caps for metric fittings protect against dirt, moisture and other contaminants. The cap can also be used as a mask during dipping, painting and plating. * Knurled for ease of application Material: Low-Density Polyethylene Color: Green 68 * For other material and color options, contact customer service.