5331-00-166-5990 O-RING #O-RING NSN: 5331-00-166-5990 P/N: N90-81611 AVAILABLE AT: WWW.CSGPARTS.COM https://bit.ly/2LfLws7 5331-00-166-5990 CSG Parts2019-03-15T17:14:53-04:00 Share This Part! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestEmail