Stud bolt ASTM A320 L7 -16 "Thread to Thread" Class 2A c/w 2 Heavy Hex Nut ASTM A194 Gr.7L Class 2B

 Stud bolt ASTM A320 L7 -16 "Thread to Thread" Class 2A c/w 2 Heavy Hex Nut ASTM A194 Gr.7L Class 2B

1, Not sticky: Almost all the material is not bonded with PTFE coating. Thin film also showed good adhesion properties.
2, Heat resistance: PTFE coating has excellent heat resistance and low temperature properties. Short period of time can be high temperature to 300 ℃, generally between 240 ℃ ~ 260 ℃ can be used continuously, with significant thermal stability, it can work without embrittlement in freezing temperatures, it does not melt at high temperatures.
3, Sliding: PTFE coating has a low coefficient of friction. Load sliding friction coefficient changes, but only in the values ​​between 0.05-0.15.
4, anti-wet: PTFE coating surface water and oil production operations are not easy to dip solution, such as sticking a small amount of dirt, simply wipe clean. Downtime is short, save time and improve efficiency.
5, Wear resistance: under high load, with excellent wear resistance. In a certain load, wear-resistant and non-adherence with the dual advantages.
6, Corrosion resistance: PTFE is almost free from erosion of the drug, in addition to withstand molten alkali metal fluoride, a strong acid medium, and above all than 300 ℃ sodium hydroxide (including aqua regia), strong oxidizing agents, reducing agent and various organic solvents, can protect parts from being any kind of chemical corrosion.

The product of 4140 alloy steel shall meet the following chemical composition standards:

C% 0.38-0.48

Si% 0.15-0.35

Mn% 0.70-1.00

P% ≤0.035

S% ≤0.040

Cr% 0.80-1.10

Mo% 0.15-0.25