Buy 21139 Part of S I T Corporation | NSN 4820-00-821-4690

Buy Aviation Parts, owned and operated by ASAP Semiconductor, is an industry-leading distributor of S I T Corporation obsolete aviation, electronic, and NSN parts. We're an AS9120B, ISO 9001:2015 certified and FAA 0056B accredited company, and the only independent distributor in the United States with a NO CHINA SOURCING pledge. Our customers in the aerospace and aviation industries know that we're dedicated to high product quality standards and customer satisfaction, making us the ideal supplier for all of their urgent Aircraft on Ground (AOG) requirements. Your order will come from any of our advanced warehousing facilities in United States.

National Stock Number (NSN), or NATO Stock Number, is a 13-digit serial number assigned by the United States Department of Defense's (DOD) Defense Logistics Agency (DLA) to items that are procured, stored, and issued through the federal supply system. For more information on NSN parts 21139 and FSC 4820 Valves Nonpowered, or NSNs in general, please feel free to call us at our toll-free number +1-714-705-4780 or email us at sales@buyaviationparts.com. You can also download the ASAP Semiconductor app from Google Play or the App Store for all the latest promotions and deals.