Excellent durability

Salt fog test

Test method: Corrosion test conducted according to ASTM B117 test method.
Test conditions: ① Salt spray test (5% NaCL 35℃) ② Salt solution volume: 1.0~2.0ml/hr ③ Salt solution PH: 6.5~7.2

Salt spray test	Misumi existing product	Economy type	Market distribution product 1	Market distribution product 2
Surface treatment	Electroless nickel plating	Trivalent chromate polishing	Trivalent chromate polishing	Trivalent chromate polishing
Plating layer thickness	4~5㎛	4~5㎛	4~5㎛	4~5㎛
Before the exam	Sample image	Sample image	Sample image	Sample image
Exam 24H	Sample image	Sample image	Sample image	Sample image
Test Results	No Corrosion	No Corrosion	Severe Corrosion	Severe Corrosion, Rust

The corrosion resistance of the economical product is equivalent to that of Misumi's existing products

※ The experimental data is obtained through our own inspection and measurement and is provided for reference only.
※ The market products are similar products that we purchased randomly from online and offline markets.

Can be used in various fields.

The effect of the washer material and the contact area of ​​the connector on the washer deformation

Small contact area (stress diagram 1)
Large contact area (stress diagram 2)

Category	Material	Stress-strain of washer
		Small contact surface	Large contact surface
Misumi existing product	S45C에 해당	1.0mm	0.01mm
Economy	Low-carbon cutting steel	2.4mm	0.02mm
Market Distribution	SPCC (Cold Rolled Carbon Steel)	3.4mm	0.08mm

Deformation Description
Pre-pressurized thickness t1
Pre-pressurized thickness t2
Deformation =t2-t1

※ Test washer sample dimensions: 16*4*1/10*3*1/(unit: mm) Screw: M4/M3, force 2N.m
※ The above data is limited to sample test results, so please use it for reference only.

range

Recommended economic type for height adjustment	Recommended economic type for stopper	Recommended economic type for spring washer	Recommended standard type for fixing oval hole screws Misumi
Metal Washer	Metal Washer	Metal Washer	Metal Washer If the contact area between the washer and the connector is small, we recommend using Misumi standard washers