Excellent two end closed hook tension coil spring

Specific

Spring 

1.Wire Dia. 

0.08-10mm 

2.Material

Carbon Steel 

3.MOQ

5,000pcs

4.Endurance Limit

5,000,000 Times

5.Engineering

Product Analysis,Design,Test,Validation ect

6.Usage of spring

Torsion Spring 

7.Payment Terms

T/T, Paypal or Escrow.

8.Type of Shipping

By express, air or sea

9.Lead Time

Within 7-15 working days after order confirmed, also based on the order quantity.

10.Heat Treatment

Tempering, Stress Relieving, Spheroidizing.

11.Packing of spring

PE bags,Cartons,Pallets.

12.Standard

ISO9001-2008, SGS Certificate,ROHS Report.

13.Test Equipments

Projector , digital hardness tester,digital torsionstrength tester.digital tension 

and compression strength tester . elasticity tester. life tester , salt spray test machine etc.

14.Quality Control

1.PPAP,SPC,FMEA,MSA quality management.
2.Tolerance control : DIN, JIS Standard.
3.Manufacturing processes inspection per hour and per batch.
4.Traceable  management  thoughout all process from raw material to customers.

15.Advantage

We are good at producing highdifficult,extremelyaccurate, reliable products,and providing 

innovative solution, Solid service for you! 

16. Pls offer us your spring spec.,we can make spring based on your requirements.   

17. Discount offered if with large order quantity.