If you’re in search for quality aviation parts such as Phase Lock, Aerospace Unlimited is your-one-stop shop. 501-1334, PL-3-SI are just a few of the Phase Lock parts that we have inventoried. In fact, we have over 6 billion new, old and obsolete parts in our procurement list. Our customers know that they can trust us because of our policy to source exclusively from certified manufacturers like L 3 Communications Corporation, Falcon Manufacturing Corp. We pride ourselves in being the only independent parts distributor with a No China Sourcing pledge. If you submit an Instant RFQ for your desired Phase Lock parts, we can provide you with a quote in as little as 15 minutes.