A new vibration resistant collar has been developed by Huck International. This collar is suitable to be used with all pins in standard threads such as Aero-Lite manufactured by Huck or other similar products available on the market.The unique feature of this product is its capability to remain free running until it meets the sheet line. Therefore, a user can install it to finger tight, set up the whole assembly, and finish the installation with a standard torque controlled collar runner or with collar runner without torque control, depending on the user's preference with the use of corresponding type of collars. The lock will develop during installation and sufficient clamp force and tensile strength are also developed in the process. A solid round lock is developed in this collar. The developed clamp force and tensile strength is comparable to collars used in similar applications at present.The locking feature developed in the collar enables it to withstand a fastener vibration test per NAS-1675. It is able to be installed in a “wet” installation with sealant without spinners and capable to squeeze out most of the excess sealant. In the non-frangible version, the collar can be re-torqued easily. In the frangible version, such feature will not be available. In addition to the ease of installation, it is also easily removable should design change or maintenance requirements demands it. This collar is uniquely designed to meet the market demand for a free running lock collar.