GB5781 is similar to GB5780, but it is a fully threaded grade C Carbon steel hexagon bolts. This means that the entire screw portion is threaded, providing a longer threaded joint length.GB5780 is a Grade C hexagon head bolt specified by the Chinese national standard, which is a low strength bolt. Its strength grade is generally below grade 4.8, and its performance grades include 3.6, 4.6 and 4.8. The bolt is of half-thread design, i.e. the screw part is not full thread.
Materials：
45#(carbon steel)0195(carbon steel) 304 316 40Cr(alloy steel) 35CrMo(alloy steel)316L 20MnTiB(alloy steel2205 Titanium Ta2 35K(carbon steel)10B21(carbon steel) SCM440(alloy steel) PVC Q235(carbon steel) 304ProTC4(titanium alloy)
Performance class：grade4.8 8.8 10.9 12.9
Unique advantages of GB5780 is a relatively low-cost half-threaded design for scenarios where high-strength fastening is not required.GB5781 offers longer threaded connection lengths for increased connection flexibility.DIN558 AND DIN601 are the same as the two standards mentioned above, and the advantages are the same.
Scope of
application
GB5780 is suitable for connections that do not require high strength and precision, such as general mechanical equipment, building structures, etc. GB5781 is suitable for applications that require longer threaded connection lengths, as well as connections that do not require high strength. DIN558 AND DIN601 have the same advantage, as the parts can be replaced, which is in line with the requirement of convenience.
Quality
Certification
Hebei Bentley is ISO9001:2015 certified and equipped with relevant certificates for quality assurance. Due to its specific dimensions and performance levels, it is suitable for a wide range of industrial and commercial scenarios including, but not limited to: machine building, construction work, transport, energy industry, timber frame connections.
inspection
Bentley has invested a huge amount of money to builda product testing laboratory, equipped with importedhigh-end instruments:such as thread comprehensivescanners, high temperature tensile testing machines,high frequency fatigue testing machines, etc., to ensurethat all products are strictly tested before leaving thewarehouse to ensure the reliability of customers duringuse.
