"U"

U-Cup - a type of seal used in a hydraulic or pneumatic cylinder. It's cross section is U-shaped to allow oil to energize the seal body to properly block oils and seal correctly.

U-cups - A "U" shape cup sealing ring designed to seal in one direction along a shaft or rod in a hydraulic or pneumatic cylinder.

Undercure - Degree of cure less titan optimum. May be evidenced by tackiness, loginess (lack of snap or resilience), or inferior physical properties.

Ultimate Elongation - The maxi- mum elongation prior to rupture.

Undercure - State of vulcanization less than optimum. It may be evidenced by tackiness or inferior physical properties.

U-Packings - A "U" shape cup sealing ring designed to seal in one direction along a shaft or rod in a hydraulic or pneumatic cylinder.