ASAP Part Services, owned and operated by ASAP Semiconductor, has over 6 billion parts inventoried. This includes new, old, used, and obsolete parts, such as AT441HSBF. As an ISO 9001:2015 certified and FAA AC 00-56B accredited company, we go to great lengths to ensure we are delivering quality parts. We partner exclusively with reliable manufacturers such as Snapon Incorporated. Our team provides superior quality assurance testing for and more. So if you are in need of Microstop Special or any other NSN parts, submit an Instant RFQ and receive a quote in as little as 15 minutes.