Metric Machine Screw

Discussion on the use of high-strength fasteners

Characteristics and applications of high-strength fasteners
High-strength fasteners refer to fasteners with relatively high performance levels, including high-strength bolts, high-strength nuts, high-strength washers
high-strength screws, and high-strength studs.
Countersunk Head Bolt

Introduction of alloy steel for fastener products

Alloy steel has a history of more than 100 years. The industrial use of alloy steel was around the second half of the 19th century.
There are thousands of alloy steel grades and tens of thousands of specifications used internationally.
Hex Castle Nut

Normalizing, annealing, quenching and tempering!

Normalizing is a type of heat treatment that improves the toughness of steel. After heating the steel member to 30 ~ 50 ° C above the Ac3 temperature
the steel member is kept in the oven for a period of time and air-cooled. The main feature is that the cooling rate is faster than annealing and lower than quenching.
Set Bolt

This article is fully annealed, quenched and tempered

The quenching of steel is to heat the steel to a temperature above the critical temperature Ac3 (hypoeutectoid steel) or Ac1 (hypereutectoid steel)
hold it for a period of time to fully or partially austenite, and then cool it at a rate greater than the critical cooling rate.

Washers for loose fastening in the transportation industry

This product is a standard part of the French railway industry. It has a ribbed design and is suitable for the connection of 8.8 bolts.
It has good anti-loosening performance and is suitable for general connection environments with low vibration.