Union ODM OEM 2.2X5 to 10.5X20 Size Stainless Steel Metal Washers

Product Description

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Product Description

Union Stainless Steel Metal Washers 

Name

Metal Washers

Material

Stainless Steel, Carbon Steel, etc

size

2.2x5 to 10.5X20 or non-standard as request&design

Surface Treatment

Plain, Passivation, Polishing, Zinc plated/ Coated, Customized

OEM

Made in China

Lead Time

Based on quantity

 

Stainless Steel Chemical Composition
Grade	C  ≤	Si  ≤	Mn  ≤	P  ≤	S  ≤	Ni	Cr	Mo	Other
201	0.15	1.00	5.5-7.5	0.060	0.03	3.5-5.5	16-18		N≤0.25
304	0.08	1.00	2.00	0.045	0.03	8.0-10.0	18-20
304L	0.03	1.00	2.00	0.045	0.03	8.0-12.0	18-20
321	0.08	1.00	2.00	0.045	0.03	8.0-13.0	17-19		Ti≤5*C%
316	0.08	1.00	2.00	0.045	0.03	10.0-14.0	16-18	2-3
316L	0.03	1.00	2.00	0.045	0.03	10.0-15.0	16-18	2-3
309S	0.08	1.00	2.00	0.045	0.03	12.0-15.0	22-24
410	0.15		1.00		0.03	-	11.5-13.5
420	0.26-0.4		1.00		0.03	-	12-14
430	0.12	0.75	1.00	0.040	0.03	-	16-18

 

Main Fastener Coating
Types	Application	Spray Test Hours	Characteristics
Zinc, Electroplated	All Metal	96Hours	Lower cost and bright surface
Hot Dip Galvanized	All Metal	96Hours	Low corrosion rate and resists mechanical damage.
Electro Nickel	All Metal	200Hours	Flexibility in plating volume and thickness
Mechanical Plating	Steel	1000Hours	Smooth finish with high anti-corrosion grade
Black Oxide	All Metal	3-5Hours	Cheap
Dacrotized	Steel	1000Hours	Pollution-free ceramic coating
Passivation	Stainless Steel	/	Dissolved iron contaminants
Wax	Stainless Steel & Plated Fasteners	Fair, used as a lubricate	Used for ease of assembly

Screw Washer

are disc-shaped pieces used with screws and bolts to distribute load, reduce friction, and protect surfaces.

Common types:
Metal - Basic steel, aluminum, or brass washers. An inexpensive, smooth surface prevents damage and sticking. Sizes from 1/4 to several inches.
EPDM - Synthetic rubber washers. Flexible, cushion vibrations, conform to uneven surfaces. Resist weathering and corrosion. Used where vibration is a concern.
Bonded Metal-EPDM - Metal washer laminated with EPDM rubber. Combines strength with vibration dampening. Used on equipment with high vibration like exhaust systems.
Roofing - Metal-EPDM washers are commonly used with roofing screws for waterproof, durable seals.

Choosing the right washer type is key for optimal fastener performance. Each offers specific advantages depending on the application. Overall, washers strengthen connections and extend service life.

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