AMS 351.00, 1' Signature Extension (zinc-coated chrome molybdenum)
AMS signature series extensions feature zinc-coated chromoly for added rust resistance. They have a heavier thread than 5/8in threaded connections, and they are generally more robust and last longer under heavy use. Signature series extensions can be connected and disconnected with only 2 1/2 turns, and have less risk of galling. Our most popular slide hammers, augers, core samplers, and soil sampling kits are available with signature series connections.