DIN934 Hexagon Head Nuts
No.:LM-1106
Material:Carbon steel(iron)
Surface treatment:Nickel plating/galvanized/black zinc
Products Description
DIN934 Hexagon head nuts has Carbon steel and stainless steel,2 different material. It is a common lock nuts,locking fastener that works by using the friction between the nut and the bolt to self-lock to prevent loosening. DIN934 Hexagon head nuts with carbon steel material can be divided into low carbon steel, medium carbon steel and high carbon steel according to the carbon content. marketing.
01
Low carbon steel carbon steel locking nut
Low carbon steel C%≤0.25%, usually called A3 steel in China, and basically called 1008, 1015, 1018, 1022, etc. abroad. Mainly used for products with no hardness requirements such as 4.8 grade bolts and 4 grade nuts, small screws, etc.
02
Medium carbon steel carbon steel locking nut
Medium carbon steel 0.25%C%≤0.45%, usually called 35# and 45# steel in China, and basically called 1035, CH38F, 1039, 40ACR, etc. abroad. Mainly used for grade 8 nuts, grade 8.8 bolts and grade 8.8 hexagon products
03
High carbon steel carbon steel locking nuts
High carbon steel C%>0.45%, currently limited in scope of application
04
Alloy steel carbon steel locking nuts
Alloy steel is made by adding alloy elements to ordinary carbon steel to increase some special properties of the steel, such as 35, 40 chrome-molybdenum, SCM435, 10B38. Fangsheng screws mainly use SCM435 chrome-molybdenum alloy steel, the main components of which are C, Si, Mn, P, S, Cr, Mo
Characteristics of carbon steel locking nuts
Product characteristics
Mechanical properties
The load holding and hardness requirements of carbon steel nuts refer to the standards for ordinary carbon steel nuts, and can be accepted by referring to standard ISO898-1 (mechanical properties requirements for carbon steel nuts). Stainless steel nuts only refer to the load holding performance requirements of carbon steel nuts, and do not require hardness.
Self-locking performance
Carbon steel locking nuts can be stamped by a die to deform the thread by about 3 teeth. After deformation, the inner diameter of the thread is slightly smaller than the outer diameter of the bolt thread. Therefore, the friction between the threads after the nut is tightened is much greater than that of ordinary threads, which can effectively prevent loosening.
Reusability
Locking nuts can be reused, but it is not recommended to disassemble and install repeatedly. After multiple disassembly and installation, the locking torque of the nut will decrease significantly (the fifth disassembly and installation will decrease significantly compared to the first disassembly and installation).
Installation method
When installing locking nuts, they must be tightened with the help of tools (such as ratchet wrench). When installing stainless steel nuts, it is recommended to pre-apply grease to prevent the nut from locking during rapid installation.
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