If you’re in need of STD-1221 or 360 Series, the team at ASAP AOG can help you with your search. We carry such items as Ring - .81 Dia X.042 Thick - Std, Lycoming, and more from reliable manufacturers like Lycoming. We’re the leaders in overhaul replacement parts, and thanks to our accreditations (ISO 9001:2015 certified and FAA AC 00-56B), we have developed a loyal following with our customers. We have a dedicated account manager per location that would be more than happy to walk you through our parts acquisition process. Contact us now for an immediate quote for STD-1221.