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If it were a modern person, they would naturally know how to do it the fastest, but Lao Hu and Ding San, two local indigenous blacksmiths, were the first to come into contact with this tool, and of course they did not have this concept.

So Huang Shi said, "You can first open the opening of the wrench to the maximum, and then directly stick its opening on the nut, and then slowly reduce the size, which will be faster." ”

After Hu Zhentian heard this, this is indeed the case after a try, in fact, these simple truths, as long as they are used a few more times, everyone will summarize and figure it out, but it is not that Huangshi did not let them have time to explore by themselves, what can be said now and what can be taught are taught first.

Then he followed what Huang Shi said, after loosening a nut and tightening it, sure enough, this wrench is very useful, and it is not bad for other nuts of the same size, which is too difficult to do in their time, and legend has it that the craftsmen of the Qin Dynasty can do this level.

"Chief, each nut is the same size!" Hu Zhentian was very surprised, everything in the upper realm seemed to have the kind of "standardization" that the chief said, from the excavator to the nuts.

Just like many of the tools that their construction team has seen, after they are completely damaged, they can remove those parts and replace them with other tools with individual damage, which can be used universally, and can be put together into a new tool, which is really amazing.

Huang Shi nodded, "That's the case, in fact, these nuts and screws have very strict standardization requirements in our upper realm." He knows this firsthand, because he does technical skills, so he often deals with these nuts and screws in his daily life.

The nut is generally called a nut, it is screwed together with a bolt or screw to do fastening parts, all manufacturing machinery must use a kind of element, it is divided into carbon steel, stainless steel, non-ferrous metals, such as copper and other types according to different materials.

Moreover, it is divided according to standards, mainly including national standard (GB), German standard (DIN), international standard (ISO), Japanese standard (JIS), American standard (ASTM/ANSI) and other standards. Among them, the national standard, the German standard, and the Japanese standard are represented by M (such as M8 and M16, and the American and British systems are represented by fractions or #, such as 8#, 10#, 1/4, 3/8, etc.).

There are many types of it, such as self-locking nuts, locknut, lock nut, four-claw nut, screw nut safety nut, thin rod screw connection nut, etc., of course, these are stainless steel, and they are the most used materials in people's daily life. However, there are also copper and alloy nuts, which are used less in those occasions.

The working principle of the nut is to use the friction between the nut and the bolt for self-locking, but the reliability of this self-locking will be reduced when the object is moving. Therefore, on some important occasions, people will take some anti-loosening measures to ensure the reliability of nut locking, among which locking nuts are one of the anti-loosening measures.

Don't look at this screw and nut is inconspicuous, but in fact, its technical requirements are not low, so the modern protagonists who have traveled to ancient times, he may be able to use his master craftsmen to hammer out a steam engine, and even make a sewing machine in three months, but don't want to create a few qualified nuts.

Because of the qualified, and not easy to change the nut, its production materials are 40CR, 45 steel, 35K, stainless steel, Q235 A3 steel, etc., the hardness level has reached 4, 5, 6, 8, 10, 12 and so on. Moreover, the distance between their two threads is also strictly required, so that even the master craftsman estimates that the texture of a nut must be engraved for several years.

Hu Zhentian and Ding San listened to Huang Shi's words and tried those tools, including several other tools in the toolbox, such as a screwdriver, which the chief said was a tool used to twist the screws to put them in place, or it could be called a "change cone", which was usually a thin wedge-shaped head, but also a plum-shaped one, which could be inserted into the groove or notch of the screw head.

Looking at these very delicate tools in their hands, the two of them were smiling, because according to the chief, they have to do some fine work, and the responsibility is also very heavy, which can skillfully use the tools in their hands, and they can do things with half the effort, so they look at these things are treasures, and they are all guys who eat.

However, they also have strange places, such as the chief has just introduced nuts, that is, those gadgets, for a long time, and his expression is very proud, and these delicate tools, on the contrary, only introduce the function of the plain and bland. Naturally, they do not understand that Yellowstone is proud of the productivity of modern society.

"Okay, now we're done with the tools, and now we're going to talk to you about how to disassemble and assemble the door lock." Huang Shi just used the accessories on the iron ladder to let the two of them use some tools, and now let them do something concrete from scratch.

At the door of the original room, Hu Zhentian, under the guidance of Huang Shi, carefully removed the door lock and held it in his hand, "Chief, you said this is the lock cylinder?" ”

"Yes, this is the lock heart, this one can be taken apart, it is called the deadbolt, do you think it looks like it?" Huang Shi pointed to the end of the lock heart again, "Also, this is an anti-lock button, if our people are in the room, as soon as they press this, the door will be locked, and people outside can only use the key to open it if they want to enter." ”

Both of them "clicked" a few times, and tried the effect of the anti-lock, "Understood, understood, chief." ”

"That's okay, old Ding, you can install it again now." Yellowstone has one person to disassemble and one person to assemble, which can save some time and make them more impressed.

…… 1600

After Lao Ding installed the door lock, Huang Shi walked back and opened the door and nodded, "Okay, you see, this door lock installation is so simple." Although the locks on the doors of these houses have been installed, if they break, the two of you will have to replace them. ”

Hu Zhentian and Ding San were a little puzzled, would these upper realm door locks be broken? If Huang Shi knew what was going on in their minds, he would have told them that not only would these locks be broken, but they would break often.

Because the lock installed in his home was broken when he was decorating, and then he bought this kind of door lock in the store a few times in a cheap way, and it didn't take long for it to break, and then he simply didn't buy it, and directly used transparent glue to stretch the cardboard on the door frame, and just close it tightly if he was alive.

And this time, when ordering a mobile house, I found that he was not only greedy for cheap, but also the manufacturer, a 200 yuan door lock and a 30 yuan door lock, they also know the choice, but let him add money to change the lock, he was a little unhappy.

After all, he also had some luck in his heart, hoping that the quality of these door locks they chose would not be as inferior as his previous ones, but he was also prepared for this, so he first let Hu Zhentian and Ding San learn to disassemble and assemble the door locks successively.

"Alright, you guys come and take a look at these things." Huang Shi beckoned to them, he had just walked to the corner and put down a pile of materials when Ding San was installing the door lock.

Hu Zhentian and the others walked over to see that there were several small white pipes piled up on the ground, which looked similar to the water pipes they had come into contact with in the construction team, but they were much thinner, smaller than the smallest pipe that connected the faucet to them.

"These are PVC pipes, which are used to thread wires." Huang Shi pointed to these pipes and said, because PVC pipes are different from irrelevant door locks, which are related to personal and property safety, so he deliberately bought some goods with good reputation, higher price, better quality, and certificates.

The surface of their pipe wall is very smooth, and the thickness is quite thick, that is, the strength of two fingers can not be broken at all, unlike some poor quality pipes, Huangshi just pinched it hard, and it was actually broken into powder.

Huangshi originally wanted to use a special galvanized pipe with national standards to make a threading pipe, because it has high strength, strong and deformation-resistant, very long life, and higher fire performance than PVC pipe. But the cost is too high, this galvanized steel pipe is N times more expensive than PVC pipe, PC16 PVC pipe is nearly one yuan a meter, and galvanized steel pipe is a few dollars a meter.

At the same time, galvanized steel pipes are more troublesome to construct, and they are not as easy to bend as PVC pipes, and it is easy to scratch the wires when threading. The corrosion resistance and aging resistance of PVC pipe are also better than that of galvanized steel pipe, the cost is also low, and the insulation performance is good. So after the last outcome, Huangshi asked Xu Fei to help buy a car of PVC pipes.

After saying the PVC pipe, Huang Shi pointed to the circles and bundles of things on the ground and said, "These are wires, you can take a look." ”

Hu Zhentian and Ding San looked at the red, yellow, and blue things on the ground, like thin ropes, squatted down like the chief, and then picked up a bundle of wires with their hands and put them in front of them.

"You can all see, these wires with various colored skins, they all have their own functions, each color has a role, and I'll tell you about their role later."

Hu Zhentian and Ding San looked at the wire head and found that the core inside seemed to be made of brass, and thought that it was no wonder it was so heavy. The purchase of wires, Huangshi has spent a lot of thought, some things can be cheap, but some things are cheap, that is terrible, so these wires Huangshi are bought with the Great Wall logo of the national standard copper core wire.