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2. Spacers and standoffs - Wikipedia

   en.wikipedia.org/wiki/Spacers_and_standoffs

   The background depicts a standoff in use, holding a circuit board above a metal case. A standoff is a threaded separator of defined length used to raise one part in an assembly above another. They are usually round or hex (for wrench tightening), often made of stainless steel, aluminum, brass, or nylon, and come in male-female or female-female ...

3. Cam and groove - Wikipedia

   en.wikipedia.org/wiki/Cam_and_groove

   Cam and groove fittings are commonly available in several materials, including stainless steel, aluminum, brass, and polypropylene. [2] Because there are no threads to become fouled, cam and groove couplings are popular in moderately dirty environments, such as septic tank pump trucks and chemical or fuel tanker trucks.

4. Ground glass joint - Wikipedia

   en.wikipedia.org/wiki/Ground_glass_joint

   A high grade stainless steel joint clip is a final option. Naturally, this can withstand the entire temperature spectrum of borosilicate glass and is reasonably inert. Lower grades of stainless steel are still rapidly attacked in the presence of the corrosive gases and the clips themselves are often as expensive as PTFE.

5. Computer case screws - Wikipedia

   en.wikipedia.org/wiki/Computer_case_screws

   Less often, the standoff has a female thread in both ends and a second screw is used to attach it to the case. Some standoffs use the M3 female thread (which faces the motherboard) instead of #6-32 UNC, and on a rare occasion a mixture of types can be used in the same case. All-metric standoffs are stated as threading x hex length x threaded ...

6. Stainless steel - Wikipedia

   en.wikipedia.org/wiki/Stainless_steel

   Stainless steel, also known as inox, corrosion-resistant steel (CRES), and rustless steel, is an alloy of iron that is resistant to rusting and corrosion. It contains iron with chromium and other elements such as molybdenum , carbon , nickel and nitrogen depending on its specific use and cost.

7. Glass-to-metal seal - Wikipedia

   en.wikipedia.org/wiki/Glass-to-metal_seal

   Uranium glass used as lead-in seals in a vacuum capacitor. Glass-to-metal seals are a type of mechanical seal which joins glass and metal surfaces. They are very important elements in the construction of vacuum tubes, electric discharge tubes, incandescent light bulbs, glass-encapsulated semiconductor diodes, reed switches, glass windows in metal cases, and metal or ceramic packages of ...