Henan / Zhengzhou expansion bolt manufacturers of inexpensive expansion bolts Yuanlong

Product Name: expansion bolts Alias: four expansion screws, four gecko, fixing screws, expansion of silk production standards: in strict accordance with JB / ZQ4763-2006 state standards. Material: Q215, Q235,25,45 # steel, 15Cr, 20Cr, 40Cr, 15MnVB, 30CrMrSi Finish: electro-galvanized (blue, white, color) selling specifications: m6x80, m8x100, m10x100, m12x120, m14x200, m16x120, m18x150, m20x200, m24x300 manufacturing process: expansion bolts by the countersunk head bolts, expander, flat washer, spring washer and hex nut components. Expansion screws by the screw and expansion tube and other components, screw tail cone shape, the inner diameter of the cone is greater than the expansion of tube diameter. When the nut is tightened when the screw moves outward through the axial movement of the thread makes tapered portion moves, and then the outer peripheral surface of the expansion pipe forming large positive pressure, coupled with a small cone angle, so that the wall, the expansion friction between the lock and conical form, thus achieving fixation. Expansion screws on the spring pad is a standard part, because of its staggered opening and elastic, so called spring washer, the spring washer is to use the wrong port of sharp corners piercing nuts peace pad to prevent the nut loose. Flat pad is standard, it is the role of nuts evenly distributed pressure on the parts to be connected for practical purposes: building walls, interior decoration, air conditioning, lighting, billboards, TV wall, bathroom (kitchen) Utilities, monitors, etc. related industries and fields. Product Rally: General product performance level 4.6 expansion bolt strength value of 1, the expansion bolt material nominal tensile strength of 400MPa grade; 2, strong expansion bolt material yield ratio of 0.6; 3, the expansion bolt nominal material yield strength of 400 × 0.6 = 240MPa stage expansion bolt performance rating is the meaning of international standard, the same performance level of expansion bolts, regardless of the origin of the difference between the material and its performance is the same, the design performance levels can use only. It is its cross-sectional area (in this case should be the effective area of ??the threads) times the yield strength of steel (Q235 yield strength is 235MPa). Due to the design value is conservative, so the allowable design stresses to be less than the yield strength. Advantages: wide applicability, the construction method is simple, high success rate of construction, high tensile design, high strength and expansion of the expansion, lock pay locking effect, no disposal problems, recyclable, high-end design. Caution: 1, drilling depth: Relevant information on the expanded length of the tube, but I found this deep enough, probably related to the residual amount of debris in the hole in the concrete construction, so you're better than the expansion tube length of about 5 mm deep. As long as you greater than or equal to the length of the expansion of the pipe, the length of stay in the underground expansion bolt is equal to or less than the length of the expansion tube. 2, expansion bolts requirement on the ground that the harder the better, of course, this also depends on the items you need to be fixed by the forces. STRENGTH installed in concrete (C13-15) is five times in the brick body. 3, after expansion bolts properly installed in the concrete in a M6 / 8/10/12, it's the least desirable maximum static force are 120/170/320/510 kg Service: The company holds quality the price, in order to conquer the concept of customer service and new and old customers so the company's products, such as the (ten days can be swapped with any questions.) Shipping way: logistics, container, direct delivery, etc. Note: The company is in the production of fasteners collectively have access to the country's daily logistics distribution vehicle enabling easy delivery, receiving timely. Henan / Zhengzhou expansion bolt manufacturers of inexpensive expansion bolts Yuanlong