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                        Special Flange Nut
                        • Special Flange NutSpecial Flange Nut

                        Special Flange Nut

                        This special Haixin® flange nut is also known and called collar nut. Compared with regular flange nut, there are two main differences. First, this special flange nut has strict and high requirement on run-out. Second, shape and appearance of the special flange nut is different, that is the diameter of its circle is equal to the width across the corner of the hexagon. Ningbo Haixin Hardware Co., Ltd has been researching, producing and supplying this special flange nut for many years.Our factory can offer premium quality collar nut to you with competitive price.

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                        Product Description

                        The grade of this special Haixin® flange nut is class 10 per ISO898-2. The raw material for this special flange nut should be free from harmful internal and external defects. Our factory always uses premium 35CrMoA or 42CrMoAfor this collar nut.These materials have a high standard of surface quality and mechanical property. So the quality of the special flange nut is well ensured from the original raw material.During past years, Ningbo Haixin Hardware Co.,Ltd has invested a lot of manpower and financial resources and purchased lots of advanced automatic machining and producing machines to improve and grade our product quality. And also because of this, our factory can survive the market and competition.

                        Product Parameter (Specification)

                        Special Flange Nut
                        Collar Nut
                        Class 10
                        flZnLnc 720h

                        Product Feature

                        For this special Haixin® flange nut, approximately 90% martensite in the core of the nut must be ensured, so the steel have sufficient harden ability and the products should be well heat treatment. And decarburization of the special flange nut thread shall be measured in analogy to external  threads as given in EN ISO898-1. Our factory will strictly carry out every test of the collar nut. Testing including dimensions, gauges, decarburization, hardness, proofload, run out, marks and finish are carried out on every batch.

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