Description New technology chinese manufacturer coil spring compression spring Material Stainless spring Specifications Wire diameter 0.1-8 intermediate diameter=11.4 Surface finish Zinc plating Capacity Wire diameter ranging from 0.2-8.0mm Wire shape Option Coil, flat , rectangular, square, triangular. Etc Material option Stainless steel:Sus301(1.4310), sus302(1.4307), sus304, sus316, sus430, Carbon steel Swc-72a, swc-65mn, 60si2mn, 55crsia, (60si2cra) Swpb(music wire), en10270-1 sh, din 17223, astm-a228 .Etc Cooper/brass Brass(cuzn36, cuzn40, cuzn30), copper(c1100~c15815), planted wire Alloy:Titanium alloy etc. Surface finish Option Nickel plating, chrome plating, zinc plating, galvanization , passivation, , silverplating, goldplating, electrophoresis, phosphorization, grain etc. Usage Machine parts / lighting accessories / hardware / plastic Advantage 7 year producing experience Engineering Product analysis , design, test, validation etc Test equipments Projector, digital hardness tester, life tester Quality control 100%inspection before shipment Certification Iso9001 certificate;rohs We accept a variety of styles of spring customization,if you want to custom,please kindly supply bellow information: 1.Material 2.Wire diameter 3.Surface treatment 4.Inner diameter and outer diameter(ID and OD) 5.Free length and work length 6.Total coils and active coils 7.Application Of course,a detailed spring drawing is the best. Our main products are as follows 1Compression spring 2.Extension spring 3.Torsion spring 4.Disc spring 5.Die spring 6.Conical spring 7.Special shaped spring