Stainless Steel Washers

Stainless Steel Washer manufacturers in India

Unifit Fastener is a trusted and leading manufacturer and supplier of premium stainless steel washers in India. Our range of SS washers is wide, and we have a strong ready-stock supply, as it is necessary to satisfy the needs of the quick supply and export. Every washer is made accurately, and we also make our own orders customized, depending on the definite needs of a client. Being one of the leading companies in the fastener industry in India.

Unifit Fastener provides washers and bolts made of stainless steel in various grades 304/304H/304L, 310/310s, 316/316L,317/317L, 321, 347/347H. We have our products in prominent application by the major contractors and engineering consultants working on power plants, renewable energy areas, wind installations, and big infrastructural projects all over the nation.

We are committed to quality and performance, and therefore we deal in stainless steel bolts, nuts, washers, and other fastening products that are geared toward long-term durability and dependability in difficult industrial conditions. Reach out to Unifit Fastener today to receive the highest-quality stainless steel washers at competitive prices.

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Table of Content

What is Stainless Steel Washer ?
Stainless Steel Washer Grades
Specification of Stainless Steel Washer
Type of Stainless Steel Washer
SS Washer Size Chart
Stainless Steel Flat Washer Dimensions
Polished Stainless Steel Washers Standard
SS Washers Weight
Industrial Applications & Uses of Stainless Steel Washers

What is Stainless Steel Washer ?

A stainless steel washer is a flat, ring-shaped metal with a threaded attachment to apportion the load and make the connection secure and prevent corrosion. It consists of heavy-duty and non-corrosive stainless steel, which has chromium to form a protective layer of oxide, hence applicable in very tough environments such as outdoor, marine, and industrial uses.

SS Plain Flat Washer Stockist, Stainless Steel Spring Lock Washers Supplier, Stainless Steel Internal Tooth Lock Washers Manufacturer in India.

Stainless Steel Washer Grades

Specification of Stainless Steel Washer

Specifications : ASTM A 193 ASME SA 193
Standard : DIN, ASTM, BS and all International Standards
Length : 3 mm to 200 mm
Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Type : Wedge Lock Washers, Square Washer, Spring Lock Washer, Self Locking Washer, Sealing Washer, Plain Flat Washer, Ogee Washer, Industrial Washer, Hex Washer, Finishing Washer, Fender Washer, Conical Washer, Countersunk Washer, Square Beveled Washer, Curved Wave Washer, External Tooth Lock Washer, Internal Tooth Lock Washers, Internal Tab Washers, lock washer Fastener, Wedge Lock Washers, Tab Washer, Structural Washers.

Type of Stainless Steel Washer

316 Stainless Steel Flat Washers

316 Stainless Steel Square Washers

316 Stainless Steel Belleville Washers

Extra Thick SS Washers

SS Ogee Washers

SS Plate Washers

Stainless Fender Washer

Stainless Beveled Washers

Stainless Spring Washers

Stainless Steel Reducing Washers

Stainless Steel Sealing Washers

Stainless Steel Countersunk Washers

SS Lock Washer

SS Shim Washers

SS Cup Washers

Stainless Bonded Washers

Heavy Duty Stainless Steel Washers

Stainless Mudguard Washers

SS Washer Size Chart

Size	O.D.	I.D.
-	MM	MM
6	19.0	3.8
8	19.0	4.3
10	25.4	5.3
1/4"	25.4	7.1
5/16"	38.1	8.6
3/8"	38.1	10.4
1/2"	50.8	12.7

Stainless Steel Flat Washer Dimensions

Size	TH (Min-Max)	OD (Min-Max)	ID (Min-Max)
-	Thickness	Outside Diameter	Inside Diameter
4	0.025 - .040	0.307- 0.320	0.120 - 0.133
6	0.036 - .065	0.370 - 0.390	0.151 - 0.164
8	0.036 - .065	0.433 - 0.453	0.183 - 0.196
10	0.036 - .065	0.495 - 0.515	0.214 - 0.227
3/16	0.036 - .065	0.557 - 0.577	0.245 - 0.265
12	0.051 - .080	0.557 - 0.577	0.245 - 0.265
1/4	0.051 - .080	0.620 - 0.640	0.276 - 0.296
5/16	0.051 - .080	0.681 - 0.703	0.339 - 0.359
3/8	0.051 - .080	0.805 - 0.827	0.401 - 0.419
7/16	0.051 - .080	0.915 - 0.937	0.464 - 0.484
1/2	0.074 - .1210	1.055 - 1.092	0.526 - 0.546
9/16	0.074 - .121	1.149 - 1.186	0.589 - 0.609
5/8	0.074 - .121	1.305 - 1.342	0.649 - 0.686
3/4	0.108 - .160	1.462 - 1.499	0.805 - 0.842
7/8	0.108 - .160	1.743 - 1.780	0.931 - 0.968
1	0.108 - .160	1.993 - 2.030	1.055 - 1.092
1-1/8	0.108 - .160	2.243 - 2.280	1.243 - 1.280
1-1/4	0.136 - .192	2.493 - 2.530	1.368 - 1.405
1-3/8	0.136 - .192	2.743 - 2.780	1.493 - 1.530
1-1/2	0.153 - .192	2.993 - 3.030	1.618 - 1.655

Polished Stainless Steel Washers Standard

DIN Standards	BS Standards	ISO Standards	JIS Standards
DIN 125 Flat washers	BS 4320 Plain washers	ISO 7089 Flat Washers	Flat Washer JSI B 1256
DIN 6798 Washer	BS 4464 Spring Washer	ISO 7090 Washer	JSI B 1256 Plain Washer
DIN 9021 Washer	BS 4463 Crinkle Washer	ISO 7092 Washer	JIS B 1251 Spring Washer
DIN 7349 Washer	BS 4320 Form G Washer	ISO 2016 Washer	-

SS Washers Weight

Size	M5	M6	M8	M10	M12	M16	M20	M24	M27	M30
Weight	0.4	1.10	2.00	3.90	5.80	10.60	16.40	31.10	39.40	50.50

Industrial Applications & Uses of Stainless Steel Washers

Stainless steel washers are essential components in industrial fastening systems, delivering strength, stability, and corrosion resistance in demanding environments. They are widely used to distribute load, minimize vibration, and protect surfaces during assembly.

Key Industrial Applications:

Oil & Gas Industry: Used in pipelines, refinery equipment, pumps, and high-pressure systems for secure leak-proof fastening.
Petrochemical & Chemical Plants: Ideal for corrosive environments where chemical exposure requires long-lasting performance.
Power Generation & Renewable Energy: Commonly used in turbines, solar structures, wind towers, and electrical equipment.
Automotive & Heavy Machinery: Provide stability in engines, suspension systems, gear assemblies, and industrial machines.
Construction & Infrastructure: Used in bridges, structural steel frameworks, rail systems, and large-scale installations.
Marine & Offshore Applications: Highly resistant to saltwater, making them suitable for ships, docks, and offshore rigs.
Food & Pharmaceutical Equipment: Ensure hygienic and corrosion-free fastening in processing units and clean-room systems.

Stainless steel washers offer reliable performance across industries where durability, safety, and precision are critical.

Frequently Asked Questions About Stainless Steel Products

1. What are stainless steel washers used for?

A washer is a thin metal or plastic disc with a hole in the center, designed to be placed under a bolt, screw, or nut. It helps distribute load evenly, protects the surface from damage, reduces vibration, and prevents issues like galvanic corrosion when different metals come into contact.

2. How do stainless steel washers help prevent corrosion?

Corrosion-resistant washers, especially stainless steel ones, act as a protective barrier between fasteners and surfaces. They minimize metal-to-metal reactions, reduce stress points, and are essential in harsh environments such as marine, chemical, or industrial applications where rust and corrosion are common.

3. Are there different types of stainless steel washers?

Yes, stainless steel washers come in many types, including flat washers, lock washers, fender washers, star washers, internal and external tooth washers, and bonded sealing washers. Each type serves a specific purpose depending on load, vibration, and installation requirements.

4. What grades are available for stainless steel washers?

The most common grades of stainless steel washers are 304 and 316 stainless steel. Grade 304 offers good corrosion resistance for general applications, while grade 316 provides superior protection in chemical, marine, or salt-exposed environments.