A couch, sofa, or settee is a piece of furniture for seating three or more people 

in the form of a bench, with or without armrests, that is partially or entirely upholstered, 

and often fitted with springs and tailored cushions.

Although a couch is used primarily for seating, it may be used for sleeping.

1. Compression Spring

Compression springs are our most common spring type, 

they have very wide range of applications and could be found in almost all 

mechanical products, such as automobile, machinery, automotive 

equipment, valves, electric switches and so on.

2. Extension Spring

Extension springs are widely used in machineries, automatic devices, 

power transmission, door locks, etc. The ends are normally different types 

of end loops and hooks, there are also a wide range of  other mechanical 

attachment possibilities, such as coiled in and screwed in attachments. 

For example, half hooks, German loops, English loops, extended hooks, 

side hooks, side loops, screw plugs and screw shackles.  

3. Torsion Spring

Torsion Springs are important component in many industry, 

such as seat belt locks, boot lid springs, backrest springs in cars and so on.

Wave Spring

Wave springs are particularly suitable choices for applications which need to reduce 

weight or the mounting space is very limited, such as aerospace and airplaine, 

precision machineries, hydraulic seals and high-end electric motors, etc.

Packaging of Springs for Sofa

Shanghai Metal Products are packed and labeled according to the regulations and customer's requests. Great care is taken to avoid any damage which might be caused during storage or transportation. In addition, clear labels are tagged on the outside of the packages for easy identification of the product I. D. and quality information.

1) Shanghai Metal Standard

2) Customization

Our Service

To meet the entirety of our customers business needs, Shanghai Metal Corporation offers its services as a “One-Stop Shop” for business services including Purchasing, Value-Added Manufacturing, Packaging/Labeling, and Delivery. Shanghai Metal Corporation prides itself on achieving superior results and satisfying customer needs. In this, we earnestly strive to fulfill our role as trustworthy and reliable supplier of business services throughout the entire world.

Our Value-Added Manufacturing Services not only save our customer time from having to out-source, but also spare them the cost of dealing with several disparate shops and deadlines. 

Belleville washers Spring

Belleville washers are naturally designed for low deflection and high load 

performance, its typical function is to create high force in small space, 

it is normally used in fasteners, railway, moulds and stampings, 

packing machines, power transmission and transformation, etc.​