12.9 Grade Bolts And Nuts

　　In fact, screw is an irregular name. There are only screws, bolts, nuts and screws in the standard terms. Smaller bolts are called screws, and bolts without end caps are called screws. Nuts are parts with internal threads connected with screws, bolts and screws.

Screws and bolts have clear professional terms and clear distinctions, and should not be arbitrarily named.

There are more than 100 national standards for the classification of screws and bolts, and there are 92 standards for screws alone. There are too many standards, which are inconvenient to remember and not listed one by one, but there are rules to follow, which can be simply distinguished as follows:

All fasteners with round heads and threaded rods are called screws. It must be tightened with a screwdriver and hexagon tools, such as slotted cheese head screws, slotted countersunk head screws, cross recessed countersunk head screws, hexagon socket head screws, hexagon socket countersunk head screws, etc; Various set screws without round head; All kinds of set screws, non - dropping screws and axial screws; All kinds of knurled screws (with knurling, do not use tools to tighten); There are also wood screws and self tapping screws.

Company Profile

Shandong TaiBang Technology Co.,Ltd is a professional fastener manufacturer ,It's located in one of the world's most important fastener production base- zhengjia town Liaocheng city,shandong province. It is near to Qingdao and Tianjin port , it is convenient to delievery .taibang attracts buyers from all over the world to visit.Our company mainly engaged in standard color production and sales,it is also customized depend on the customer demand . the company covers an area of 6000 square meters, hundreds of employees, with more than 70 sets of high-end cold heading machine, annual output of more than 5000 tons,engaged in import and export industry for more than 10 years.Our main products are:flat washer. spring washer , stamping , bolts and nuts ,expansion screw, and lead screw with perfect equipment and excellent product quality, our products are sold all over the country and are deeply trusted and praised by users inside and outside the industry. Taibang technology co,. ltd will provide you with sincere service in the whole process.the essence of the company quality first, service first principle.All employees of Taibang technology wholeheartedly welcome new and old customers to inquire, visit and cooperate!Sincerely look forward to cooperating with you.