Final answer:
2) Velcro, The nape strap pad on the HGU-56P helmet is secured using velcro, which provides adjustability and ease of use.
Step-by-step explanation:
The nape strap pad on the HGU-56P helmet is secured to the helmet shell using velcro. Velcro is a type of fastener that consists of two components: hooks and loops. The hooks are on one side and the loops are on the other, allowing them to stick together when pressed. This method offers easy adjustability and quick release, important features for helmet safety and comfort.
This fastening mechanism ensures a secure and adjustable fit around the wearer's nape, contributing to comfort and stability during use. The buckle allows for quick and easy fastening and unfastening, facilitating the proper donning and doffing of the helmet. This design feature is common in aviation helmets, providing a reliable and efficient method for securing various components of the headgear to ensure a snug and customized fit for individual users.