An elbow is an angular fitting used to change the direction of a pipe.

An electric drill is anelectric powered handheld tool for boring holes and driving fasteners with more torque than a cordless drill

An elevation view is a view of a building seen from one side, a flat representation of only one face. This is the most common view used to describe the external appearance of a building.

Emory clothis an abrasive sandpaper roll used for sanding and prepping copper pipe ends. 

An end cap is a fitting used to seal the end of a pipe or tube 

The end grain of a board is the grain pattern of the wood as seen from either cross-cut end

An end stud  is a vertical full length framing component placed at each end of the top and bottom plates that defines the length of the wall

Energy efficient framing is a framing method using fewer framing components with the goal of eliminating unnecessary framing materials and creating fewer points of thermal bridging within the structure. The result is less energy needed to heat and cool a building

Epoxy is a durable surface coating that is very abrasion and chemical resistant. This specialized paint usually requires a hardener additive that cures the paint rather than air drying

Epoxy coated is a hardened paint coating meant as corrosion protection for exterior screws – usually applied over zinc electroplate