General Dynamics (NYSE: GD) has acquired the defense operations of Gayston Corp., a Springboro, Ohio–based maker of precision metal components used in several munitions programs. No pricing terms of the all-cash deal were disclosed. www.gayston.com
Kohlberg Kravis Roberts & Co. has agreed to sell Unisteel Technology International Ltd., a Singapore-based maker of precision components and assemblies, to Switzerland’s SFS Group. No financial terms were disclosed. www.kkr.com
Facebook (Nasdaq: FB) has acquired Threadsy, developer of an integrated communications client for the social web. No financial terms were disclosed. Threadsy had raised over $3 million in VC funding from firms like August Capital and Harrison Metal. www.threadsy.com
Trimble (Nasdaq: TRMB) has agreed to acquire TMW Systems Inc., a Beachwood, Ohio–based provider of enterprise software to transportation and logistics companies, for $335 million in cash. Sellers include Pamlico Capital. www.trimble.com
Wittlebee, a Los Angeles–based subscription service for children’s clothing, has acquired Chicago-based brand Cottonseed Clothing Inc. No financial terms were disclosed. Wittlebee has raised $2.5 million from Rincon Venture Partners, Google Ventures, Crosslink Capital, Morado Ventures and SoftTech VC. www.wittlebee.com
Sign up for Dan’s daily email newsletter on deals and deal-makers: GetTermSheet.com