Aircraft Tool Supply Semco Manual Sealant Gun (2.5Oz) by Aircraft Tool Supply at Donations Central. MPN: 850-2. Hurry! Limited time offer. Offer valid only while supplies last. 2.5oz manual sealant gun. The Semco model 850 gun is a hand-operated, high quality dispensing gun designed to accept Semco disposable cartridges or Semkit packages. It is excellent for the ''in-field'' application of sealants, adhesives, and other materials. A threaded retainer provides a tight fit into the ratchet handle, permitting uninterrupted operation. It also allows for the quick and easy replacement of cartridges. Each package contains the dispenser handle and a metal retainer..
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