MS25042-22D is a plug dust cap designed for unmated AS50151 connectors, offering environmental protection and keeping impurities out of the termination area. The product is available with multiple QPL plating options including Cadmium (finish D), Anodized Black (finish DA), and Black Zinc Nickel (finish DZ), with operating temperature ranges from -65°C to 175°C or -65°C to 200°C depending on finish selection. The dust cap features a threaded interface (1.375-18 UNEF for shell size 22) with a maximum body diameter of 36.5 mm and is offered with optional chain or ring attachments in standard or extended lengths. This connector accessory is ideal for harsh and demanding environments where protection of unmated connector interfaces is critical during storage or non-operational periods.