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A nut is a type of fastener with a threaded hole. Nuts are almost always used in conjunction with a mating bolt to fasten multiple parts together. The two partners are kept together by a combination of their threads' friction (with slight elastic deformation), a slight stretching of the bolt, and compression of the parts to be held together.

The most common shape today is hexagonal, for similar reasons as the bolt head: six sides give a good granularity of angles for a tool to approach from (good in tight spots), but more (and smaller) corners would be vulnerable to being rounded off. It takes only one sixth of a rotation to obtain the next side of the hexagon and grip is optimal. However, polygons with more than six sides do not give the requisite grip and polygons with fewer than six sides take more time to be given a complete rotation. Other specialized shapes exist for certain needs, such as wingnuts for finger adjustment and captive nuts (e.g. cage nuts) for inaccessible areas.

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Q1: Are you trading company or manufacturer ?A1: We are factory.Q2: Can I visit your factory?A2: Yes! Warmly welcome to visit our factory. It would be Great if you can inform us in advance.Q3:The quality of your products?A3:The company has advanced production and testing equipment .Every products will be 100% inspected by our qc department before shipmentQ4:How about your price?A4:High quality products with reasonable price. Please give me a inquire, I will quoted you a price for you refer at once.Q5:Could you provide free samples?A5:We can provide free samples for standard fastener, But the clients will pay the Express charges.Q6: What’s your Delivery Time?A:Standard parts: 7-15days,Non-standard parts: 15-25days.We will make the delivery as soon as possible with the guarantee quality.Q7: How should I order and make payment?A7:By T/T, for samples 100% with the order; for production, 30% paid for deposit by T/T before production arrangement, the balance to be paid before shipment.

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