discount 70% in 2018-09-19 to 2018-09-21
price: USD$ 59.51
freight :USD$7.00,(Postal parcel)
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Also known as thread screw threads, the thread (tooth type angle 60, cutting depth is H/8) is different from the Whitworth Thread (tooth type angle 55, cutting depth is H/6). The first letter "U" of the unified thread code "UN" comes from the "unification" between the allies, and the latter letter "N" comes from the code "N" of the national thread of the United states".
The first digit 3/8 said the screw diameter in inches, converted to metric units mm is multiplied by 25.4, which is 3/8 * 25.4=9.525mm; second, third, 24, 32, 16 and 20 per inch (the number of teeth in the length of 25.4mm); third after the words UNF, UNFF, UNC, code UN for the last two series code, 2A precision grade. UNC: unified coarse thread
Thread (except for) generally refers to the standard thread tooth type ANSIB1.1, the tooth angle is 60 degrees, parallel threads. Thread series refers to the combination of thread diameter and pitch, for Unified threads ASME refers to different number of teeth per inch in diameter corresponding to a certain set, namely the number of teeth per inch. Thread series including UNC, UNF, UNEF, UN, UNS five series, respectively, on behalf of the coarse and fine teeth, teeth, fine pitch, constant special thread. Among them, UNC, UNF is the most commonly used. The outer diameter of smaller size with said designations such as: NO:0, NO:1, NO:2, NO:3, NO:4, NO:5 until NO:12, a total of 10 numbers; then by inches, such as: 1/4-20UNC, 1/4 is the outer diameter, 20 teeth per inch, UNC refers to the coarse thread of American unity. The following is a common American ordinary (non useful) tap (TAP) specifications at the beginning of the U: NO0-80UNF, NO1-64UNC, NO2-56UNC, NO3-48UNC, NO4-40UNC, NO4-48UNF, NO5-40UNC, NO6-32UNC, NO6-40UNF, NO8-32UNC, NO8-36UNC, NO10-24UNC, NO10-32UNF, NO10-40UNS, NO12-24UNC, NO12-28UNF, NO12-36UNS, 1/4-20UNC, 1/4-24UNS, 1/4-28UNF, 1/4-32UNEF 5/16-20UN, 5/16-24UNF, 5/16-18UNC, 5/16-27UNS, 5/16-32UNEF, 3/8-16UNC, 3/8-20UN, 3/8-24UNF, 3/8-32UNEF, 7/16-14UNC, 7/16-20UNF, 7/16-24UNS, 7/16-28UNEF, 1/2-12UNS, 1/2-13UNC, 1/2-16UN, 1/2-20UNF, 1/2-28UNEF, 9/16-12UNC, 9/16-18UNF, 9/16-24UNEF, 5/8-11UNC, 5/8-18UNF, 5/8-24UNEF, 3/4-10UNC, 3/4-16UNF, 3/4-20UNEF, 3/4-24UNS, 7/8-14UNF, 7/8-20UNEF, and 7/8-24UNS, 1 5/16-28UN, 1, -8UNC, 1, -12UNF, 1, -20UNEF, 1-1/8-12UNF, 1-1/8-16UN, 1-1/4-7UNC, 1-1/4-12UNF, 1-1/2-6UNC and so on.
1: our preferred STO, you can also choose. Through courier express every day, to send other express buyers, take the initiative to contact us, and must note, urgently SF express mail, remote EMS, required to pay the balance of the freight, please contact us, thank you.
2: buyers photographed products, please carefully check the details of receiving goods, so as not to cause unnecessary trouble;
3-: under normal circumstances, delivery time: buyers in the afternoon before 16:30 photographed and payment of goods, normal can be shipped on the same day, after 16:30 in the afternoon to buy goods, the next day delivery, weekend, holidays postponed.
4: please kiss on the receipt of mail, please check the number of face to face inspection, check and correct after the signature! If the goods are found damaged, the number of discrepancies, unpacking of goods damaged, please refuse to sign, and timely contact with us. If the sign after the discovery of the above problems, the transport side will not assume any responsibility, as the seller can not, please remember!
5: express delivery time, due to weather reasons, vehicle failure and other reasons, resulting in the delay of transportation time, can not be estimated, inform us, we actively cooperate with the urge, please be patient to wait. Dispatch must be specified (SF express)
6. please buyers after receipt of goods, acceptance of goods without problems, as soon as possible within 1-2 days to confirm receipt, if there is a timely notification or timely treatment for you, 1-2 days after receipt of the goods did not confirm, and did not contact the owner. The goods deemed to be received by buyers are qualified. After asking the owner to replace the accessories or say that the goods have problems, our shop is not responsible! Please buyers know!
7. because of a variety of products, occasionally out of stock, so in determining the purchase of baby before the first contact with us to see whether there is stock, the stock will not normally, if there is out of stock, I will contact you, you can choose a refund or other goods, I hope parents can understand, so as not to delay the normal use of pro, thank you!
8. please try to contact us before you take the goods, confirm the freight, product specifications, quantity, so as to avoid wrong, cause unnecessary trouble;
9. if the quality of the store Baotuibaohuan, please be sure to contact within 72 hours of the shop, and the original products packing back, does not affect our 2 sales situation can be returned, such as the wrong goods freight borne by our seller, if damaged, we will return the goods to the service. Please Pro understanding. If 72 hours after receipt of no contact with us, then we will default to the buyer received the qualified products, we asked again after the replacement of parts or that the goods in question, this shop will be not responsible! Please buyers understanding!
10. all the goods we sent will be carefully packaged, but everything has an accident, if the individual cases of damaged goods in transit and packing box, we will not be liable if the damage occurs, the product itself, we will assume responsibility!
11. we will check the goods before the issue, absolute guarantee issued goods are intact, the buyer receives goods should be the face when the courier inspection after the sign, if there is a problem, you can reject!!! If the courier company does not allow the inspection after the sign, so parents can first sign and then when the courier plane opened, if the goods no problem to let the courier leave, if the goods in question, damage, let the courier company to provide "damaged goods proof", and then through the courier company to return, I shop for replacement. If the parents have to sign the damaged goods for the replacement, return, the restaurant will not to return, thanks for your support!!
The goods are pro money in Taobao yesterday, so please close to sign, this is responsible for the pro own goods, responsible for the pro money, please close together to combat violent express!!!