Hot Dip Galvanized Self-locking Bolts and Nuts

Description

Material Grade: 45 Steel, 40Cr, A173, H7, A3Steel, SS304, SS301S, SS316L, etc.
Grade: 4.8, 6.8, 8.8, 10.9, 12.9
Specification: M10, M12, M14, M16, M20, M22, M24, M27, M30, M33, M36, M42, M48, M52, M56, M60, M64, M68, M72, M76, M80, etc.
Bolt-head Shape: Oval Head, Square Head, U-shaped bolt, etc.
Application: Steel Frame Connections, Column Connections and Brake Systems

Hot Dip Galvanized Self-locking Bolts and Nuts Chemical Composition:

Composition (%)	C	Si	Mn	Cr	Ni	Cu
45 steel	0.42-0.50	0.17-0.37	0.50-0.80	≤0.25	≤0.30	≤0.25

Our Photos for Hot Dip Galvanized Self-locking Bolts and Nuts :

Hot dip galvanizing (HDG) is also a common surface coating for steel fasteners. It provides a very solid and durable corrosion protection.
The process of hot dip galvanizing is quite simple: the fasteners are dipped in a bath of molten zinc with normal temperatures around 455°C to 480°C and high temperatures between 530°C and 560°C).
Next, the fasteners are spun to remove the excess zinc, and then they are cooled in water to solidify the zinc.
What remains is a layer of zinc (40 to 70 microns) on the surface of the products that is relatively thick compared to zinc electroplating (3 to 20 microns).
Nuts are processed in the same way, except the nut thread is not yet formed. Nut threads must always be tapped after HDG.
The HDG process is commonly regarded as suitable for fasteners with diameters M8 or larger.

Our Experience:

Trading Terms:

The nearest seaport: Shanghai port
The nearest airport: Shanghai Pudong airport
Payment Terms:L/C,TT,West Union,Paypal
Payment Condition:50% before production, 50% before delivery against complete set of inspection report
Supply Capability: 10,000 tons per year
Sample Availability: yes
Sample Time:15-30 Days
Packing: Plywood Cases or Steel Crates
Delivery time: 45 working days per 20 tons regular castings & forgings
Service: OEM, ODM or Customized