High Quality Stainless steel Adjustable Extension Spring
High Quality Stainless steel Adjustable Extension Spring
High Quality Stainless steel Adjustable Extension Spring
High Quality Stainless steel Adjustable Extension Spring
High Quality Stainless steel Adjustable Extension Spring
High Quality Stainless steel Adjustable Extension Spring
High Quality Stainless steel Adjustable Extension Spring

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High Quality Stainless steel Adjustable Extension Spring

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Model No. : Stainless steel Extension Spring
Brand Name : DONVA

Product description

High Quality Stainless steel Adjustable Extension Spring
Specific High Quality Stainless steel Adjustable Extension Spring
1.Wire Dia.  3.0mm
2.Material Music Steel
3.MOQ 5,000pcs
4.MPN 1000,000pcs/Even higher
5.Endurance Limit 5,000,000 Times
6.Engineering Product Analysis,Design,Test,Validation ect
7.Usage of Torsion Spring High Quality Stainless steel Adjustable Extension Spring
8.Payment Terms T/T,L/C,Western Union or Escrow.
9.Type of Shipping By Sea,Air,Express. 
10.Lead Time Within 7-15 working days after order confirmed, also based on the order quantity.
11.Processing Craft Material purchased-production-heat treatment-surface treatment-quality detection
-package-shipping.
12.Heat Treatment Tempering, Stress Relieving, Spheroidizing.
13.Packing of Torsion Spring PE bags,Cartons,Pallets.
14.Standard ISO9001-2008, SGS Certificate,ROHS Report.
15.Test Equipments

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

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

machine etc.

16.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.
17.Advantage

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

providing innovative solution, Solid service for you! 

 
18.Pls offer us your spring spec.,we can make spring based on your requirements.     
19.Discount offered if with large order quantity.
20.100% return goods or refund payment if quality problem.
21.Established in 2004,but the company’s employees have 20 years of spring production technology experience. 
    How to order  1.Pls send me your drawing or sample 2.We offer you our best price 3.After you confirmed the price,we start to prepare the sample(usually within one week) 4.After you confirmed the sample,you place an order   We import the most sophisticated computer compression spring machine from Taiwan; it can do 100 percent inspection to spring length, which ensured the spring quality stable and precise.  
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