The importance of screw matching
When most buyers pay attention to the anchor bolt, they only pay attention to the anchor bolt itself and ignore the importance of the anchor nut. As for the manufacturer, most manufacturers only produce anchor bolts but not nuts, which may cause the problem of matching degree. General non-standard bolt screw diameter are under standard of gb, non-standard bolt + gb nut will appear nut shaking serious problems, such as the use of equipment carried nut drawing experiment, basic is not optimistic, its mechanical performance test results also for the anchor bolt or nut more slippery tooth, this is equivalent to anchor the tensile performance of big discounts. So, when anchor bolt of choose and buy should choose the manufacturer that executes national standard as far as possible, be like true charge budget is insufficient, so can oneself undertake relevant detection according to national standard only.
Importance of nut grade
Another fatal industry problem is the mismatch of nut grades. We know that there are class 4.8, class 5.8, class 6.8 and class 8.8 anchor bolts, and some high strength anchors even reach class 10.9. However, the strange standard in the industry is that the matching nuts are class 4 nuts regardless of the grade of anchor bolts. On the one hand, this limits the overall performance of anchor bolts, and at the same time, some projects with higher stress requirements have higher safety risks, especially those that test the tensile performance of anchor bolts, such as the inverted anchor to fix heavy objects.
The above analysis hopes to help you, handan haoqiang fastener manufacturing co., ltd. is a fastener manufacturing, research and development, sales, service in one of the large enterprises. Specializing in the production of m6-m24 series national standards, new national standards nuts, m24-m60 polished nuts, high-strength nuts, back buckle, fine buckle, increase, thickening and various special-shaped nuts, according to the national standards (GB), American standards (ANSI), German standards (DIN), international standards (ISO) production or according to customer drawings processing. The company set up a zinc branch factory, the introduction of foreign advanced pollution-free equipment, can produce a variety of galvanized parts.