Washer Assembled Screws 310w/washers(SAIMA/310ex)

Thank you for your cooperation with SAIMA and Export division 310express.

After emailed Vol229, we have received many inquiries from customers.


【Why customer uses 310w/washers?】

By expanding bearing surface, it is possible to prevent bearing surface depression.

Once depression starts, fastener is loosen easily.

Many customers are using these screws in their product.

with Spring Washer

with Spring Washer + Flat Washer(JIS/ISO)

with Spring Washer + Small Flat Washer(JIS/ISO)


Factory must purchase spring washers or flat washers for assembly type many pieces.

SAIMA has stock different kind of washer assembled screw as 310w/washers.


310w/washers Applications from our FACEBOOK page



Please visit our web catalog

*310express is our export Dep.



If you have any problem about screw assembled washers, please feel free to contact us!!


Have a nice weekend!!