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| Feeler gauge
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Also called a thickness gauge, this series of precision thickness, metal blades is used for measuring small gaps, with each blade being marked with the thickness in thousandths of an inch. |
| Feet per minute (fpm)
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This measurement of the velocity of air or other mediums is used in calculating pump capacity or for HVAC systems, etc. |
| Felt
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(1) Fabric whose fibers are worked together by pressure, heat, chemical action, etc. instead of being woven or knitted. (2) Felt, saturated with an asphalt compound, which is used under roof shingles or flashing for water resistance. |
| Felt machine
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A machine that will install bitumen and felt at the same time. |
| Felt paper
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Papers, sometimes tar-impregnated, used on roofs and sidewalls to give protection against dampness and leaks. |
| Felt papers
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Fabric made of different fibers, such as glass-fiber felts or asbestos fiber felts. Female Plumbing term for the pipe or fitting that receives the end of a pipe or fitting, called the male. |
| Female fitting
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A fitting that receives a pipe or fitting. A fitting into which another fitting is inserted. |
| Female iron pipe (fip)
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Standard internal threads on pipe fittings. |
| Female threads
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Faucet threads that are in place on the inside of a fitting. |
| Female threads
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Threads that are in place on the inside diameter of an object. |
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