M2.5 M3 Hex Socket Head Screws Shoulder Bolts Step Set Screws Grade 12.9 Steel

US $1.75

Shenzhen, GD, China
Aug 19th

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Product Information: 12.9 GRADE HIGH-STRENGTH HEXAGON SOCKET SCREW Shoulder step pressure plate positioning screw bolt Category: set screws Head type: Hexagon socket Material: carbon steel Model: Stepped Hexagon Screw The product is made of 12.9 grade high-strength carbon steel material, which has the characteristics of high toughness, good cold and hot workability, and excellent machinability. Grade 12.9 bolt material, commonly known as high-strength bolt, is suitable for steel frame structure beam-column connection, solid web beam connection, heavy crane beam connection brake system of industrial plants and connection of important structures that bear dynamic loads characteristic 8.8 level: Low carbon steel has low strength and hardness, high plasticity and toughness, good welding performance, good forgeability and stamping ability, and low carbon content also brings better corrosion resistance 10.9 level: SCM435 features: high static strength, impact toughness and high fatigue limit, higher hardenability than 40Cr, high creep strength and endurance strength at high temperature, long-term working temperature can reach 500°C; Level 12.9: 40Cr can obtain higher surface hardness after nitriding treatment. After 40Cr quenching and tempering, the nitriding treatment hardness can reach up to 72~78HRA, and the core hardness can reach 43~55HRC. Generally, those above 8.8 are called high strength, and 8.8, 10.9, and 12.9 are all high strength. The process is basically the same, the difference lies in the material and mechanical properties. Grade 8.8 is more common, such as agricultural machinery and automobiles, 10.9 is mainly used for construction tower cranes, 12.9 aviation, railways and so on. Package Including: According to your choice. Other accessories are not included.

Condition:	New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. ...	Brand	Unbranded
System of Measurement	Metric
Custom Bundle	No
Type	Step Set Screws
Screw Size	M2.5,M3
Material	Carbon Steel
Head Style	Hex Head
Country/Region of Manufacture	China
MPN	Does not apply
Item Length	4-8mm
Drive Style	Hex-Key
Model	Shoulder Bolts Step Set Screws
Grade	12.9