10-329391-011 is a plug protection cap designed to shield and protect threaded connectors from contamination and damage. It features a 0.625-24UNEF thread class 2A specification with a body diameter of 0.641 inches and an approximate height of 3.5 inches, with a maximum length of 1.312 inches. The cap is manufactured by Amphenol Industrial Operations as part of their MS/Standard Accessories line and is available with optional chain terminations including sash chains, beaded chains, or without chains. This protection cap is commonly used in aerospace, military, and industrial applications where connector integrity and cleanliness are critical requirements.