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This is a product with a gas hole and hexagonal hole that has an axial through hole (gas vent hole) to remove gas that accumulates at the bottom of the screw hole when tightening. We have products suitable for various uses, such as bolts with holes (caps), button bolts, and set screws. Used in vacuum equipment, vacuum containers, FPD manufacturing equipment, semiconductor manufacturing equipment, etc. When the gas that accumulates at the tip of the screw hole during tightening is depressurized, it leaks out little by little through the gaps between the screw threads (virtual leak), causing problems such as the target pressure not being easily lowered to the target pressure, and the degree of vacuum gradually decreasing after the pump is stopped. cause. When temperature and mass are constant, the relationship (Boyle's law) holds between atmospheric pressure and volume: (atmospheric pressure) × (volume) = (constant). When the pressure is reduced from atmospheric pressure (approximately 1,013 hPa) to low vacuum (approximately 100 Pa), the volume of gas increases by 1,000 times. This is why even a small amount of gas retention can have a big impact. There are also lightweight titanium products with excellent corrosion resistance.
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See all 10 models in listPart Number
With hexagonal hole (with gas vent hole)Product
With hexagon socket/other holesHandling Company
Bossard Co., Ltd.Categories
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