Our company integrates product design, manufacturing, marketing and technical support, professionally providing expansion bolt, U Bolt, DIN Standard flat washer and related integrated supporting services. We promote a sense of rules and a spirit of contract that are compatible with the market economy and modern governance, so that integrity can be upgraded to a commitment to customers and a guarantee to employees. We stick to the principle of 'quality first, service first, continuous improvement and innovation to meet the customers' for the management and take 'zero defect, zero complaints' as the quality objective.
Shanghai Jinrui Norm Parts Supplies Co.,Ltd is one of the leading gb carriage bolt manufacturers and suppliers in China, welcome to buy gb carriage bolts, gb standard carriage bolt from our factory and company.
This standard of the GB carriage bolt stipulates the thread size from M5-M20. As the aquare neck,the depth of square shall be measured,parallel to th axis of bolt at the midpoint of the flats of square,from the bottom of square to the bearing surface for bolts having flat bearing surface type heads,and to the intersectio of flats of square with the conical bearing surface for bolts having countersunk head.The corners of square neck may be rounded to the extent specified in the respective dimensional tables and need not be filled out for the total depth of square.
Yellow zinc plated
Excellent first' in mind, we operate closely with our customers and supply them with efficient and expert services for Vodafast Mushroom Head Short Square Neck Carriage Bolts Class 4.8 Class 6.8 Class 8.8 Zinc Plated. We are looking forward to cooperating with you sincerely to achieve a win-win situation. Through resource integration and industrial coordination, we constantly break the boundaries of development and improve the environmental quality of services.